diff --git a/include/boost/config/compiler/borland.hpp b/include/boost/config/compiler/borland.hpp
index ccd930ea..62494b88 100644
--- a/include/boost/config/compiler/borland.hpp
+++ b/include/boost/config/compiler/borland.hpp
@@ -19,9 +19,9 @@
 // last known compiler version:
 #if (__BORLANDC__ > 0x613)
 //#  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 //#  else
-//#     pragma message( "Unknown compiler version - please run the configure tests and report the results")
+//#     pragma message( "boost: Unknown compiler version - please run the configure tests and report the results")
 //#  endif
 #elif (__BORLANDC__ == 0x600)
 #  error "CBuilderX preview compiler is no longer supported"
diff --git a/include/boost/config/compiler/codegear.hpp b/include/boost/config/compiler/codegear.hpp
index e2f6061b..c9a36aca 100644
--- a/include/boost/config/compiler/codegear.hpp
+++ b/include/boost/config/compiler/codegear.hpp
@@ -22,9 +22,9 @@
 // last known and checked version is 0x621
 #if (__CODEGEARC__ > 0x621)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  else
-#     pragma message( "Unknown compiler version - please run the configure tests and report the results")
+#     pragma message( "boost: Unknown compiler version - please run the configure tests and report the results")
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/comeau.hpp b/include/boost/config/compiler/comeau.hpp
index 09841604..ca80fac3 100644
--- a/include/boost/config/compiler/comeau.hpp
+++ b/include/boost/config/compiler/comeau.hpp
@@ -50,7 +50,7 @@
 // last known and checked version is 4245:
 #if (__COMO_VERSION__ > 4245)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/digitalmars.hpp b/include/boost/config/compiler/digitalmars.hpp
index c344aae0..61d1d199 100644
--- a/include/boost/config/compiler/digitalmars.hpp
+++ b/include/boost/config/compiler/digitalmars.hpp
@@ -120,6 +120,6 @@
 // last known and checked version is ...:
 #if (__DMC__ > 0x848)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
diff --git a/include/boost/config/compiler/gcc.hpp b/include/boost/config/compiler/gcc.hpp
index e319d049..42fccdd3 100644
--- a/include/boost/config/compiler/gcc.hpp
+++ b/include/boost/config/compiler/gcc.hpp
@@ -318,11 +318,11 @@
 // last known and checked version is 4.9:
 #if (BOOST_GCC_VERSION > 40900)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  else
 // we don't emit warnings here anymore since there are no defect macros defined for
 // gcc post 3.4, so any failures are gcc regressions...
-//#     warning "Unknown compiler version - please run the configure tests and report the results"
+//#     warning "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/greenhills.hpp b/include/boost/config/compiler/greenhills.hpp
index a76a07cf..39112c2c 100644
--- a/include/boost/config/compiler/greenhills.hpp
+++ b/include/boost/config/compiler/greenhills.hpp
@@ -21,7 +21,7 @@
 // last known and checked version is 0:
 #if (__ghs > 0)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/hp_acc.hpp b/include/boost/config/compiler/hp_acc.hpp
index a773b8c4..939dc90f 100644
--- a/include/boost/config/compiler/hp_acc.hpp
+++ b/include/boost/config/compiler/hp_acc.hpp
@@ -141,6 +141,6 @@
 // last known and checked version for PA-RISC is 38000
 #if ((__HP_aCC > 61300) || ((__HP_aCC > 38000) && defined(__hpxstd98)))
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
diff --git a/include/boost/config/compiler/intel.hpp b/include/boost/config/compiler/intel.hpp
index 80969e9e..cbad6b49 100644
--- a/include/boost/config/compiler/intel.hpp
+++ b/include/boost/config/compiler/intel.hpp
@@ -531,13 +531,13 @@ template<> struct assert_intrinsic_wchar_t<unsigned short> {};
 // last known and checked version:
 #if (BOOST_INTEL_CXX_VERSION > 1500)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  elif defined(_MSC_VER)
 //
 //      We don't emit this warning any more, since we have so few
 //      defect macros set anyway (just the one).
 //
-//#     pragma message("Unknown compiler version - please run the configure tests and report the results")
+//#     pragma message("boost: Unknown compiler version - please run the configure tests and report the results")
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/kai.hpp b/include/boost/config/compiler/kai.hpp
index 960d501c..0b22ec1d 100644
--- a/include/boost/config/compiler/kai.hpp
+++ b/include/boost/config/compiler/kai.hpp
@@ -25,7 +25,7 @@
 // last known and checked version is 4001:
 #if (__KCC_VERSION > 4001)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/metrowerks.hpp b/include/boost/config/compiler/metrowerks.hpp
index 3c5e2286..fc501d9f 100644
--- a/include/boost/config/compiler/metrowerks.hpp
+++ b/include/boost/config/compiler/metrowerks.hpp
@@ -168,7 +168,7 @@
 // last known and checked version:
 #if (__MWERKS__ > 0x3205)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/mpw.hpp b/include/boost/config/compiler/mpw.hpp
index 084f9e15..8c801df6 100644
--- a/include/boost/config/compiler/mpw.hpp
+++ b/include/boost/config/compiler/mpw.hpp
@@ -115,7 +115,7 @@
 // last known and checked version is 0x890:
 #if (MPW_CPLUS > 0x890)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/sunpro_cc.hpp b/include/boost/config/compiler/sunpro_cc.hpp
index 8f07e0e9..c3a06292 100644
--- a/include/boost/config/compiler/sunpro_cc.hpp
+++ b/include/boost/config/compiler/sunpro_cc.hpp
@@ -193,6 +193,6 @@
 // last known and checked version is 0x590:
 #if (__SUNPRO_CC > 0x590)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
diff --git a/include/boost/config/compiler/vacpp.hpp b/include/boost/config/compiler/vacpp.hpp
index 3fbed9fa..233c8353 100644
--- a/include/boost/config/compiler/vacpp.hpp
+++ b/include/boost/config/compiler/vacpp.hpp
@@ -56,7 +56,7 @@
 // last known and checked version is 1210:
 #if (__IBMCPP__ > 1210)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  endif
 #endif
 
diff --git a/include/boost/config/compiler/visualc.hpp b/include/boost/config/compiler/visualc.hpp
index 72caff49..adbf1b81 100644
--- a/include/boost/config/compiler/visualc.hpp
+++ b/include/boost/config/compiler/visualc.hpp
@@ -240,9 +240,9 @@
 #   if _MSC_VER < 1400
       // Note: I'm not aware of any CE compiler with version 13xx
 #      if defined(BOOST_ASSERT_CONFIG)
-#         error "Unknown EVC++ compiler version - please run the configure tests and report the results"
+#         error "boost: Unknown EVC++ compiler version - please run the configure tests and report the results"
 #      else
-#         pragma message("Unknown EVC++ compiler version - please run the configure tests and report the results")
+#         pragma message("boost: Unknown EVC++ compiler version - please run the configure tests and report the results")
 #      endif
 #   elif _MSC_VER < 1500
 #     define BOOST_COMPILER_VERSION evc8
@@ -258,9 +258,9 @@
 #     define BOOST_COMPILER_VERSION evc14
 #   else
 #      if defined(BOOST_ASSERT_CONFIG)
-#         error "Unknown EVC++ compiler version - please run the configure tests and report the results"
+#         error "boost: Unknown EVC++ compiler version - please run the configure tests and report the results"
 #      else
-#         pragma message("Unknown EVC++ compiler version - please run the configure tests and report the results")
+#         pragma message("boost: Unknown EVC++ compiler version - please run the configure tests and report the results")
 #      endif
 #   endif
 # else
@@ -297,8 +297,8 @@
 // last known and checked version is 19.00.23026 (VC++ 2015 RTM):
 #if (_MSC_VER > 1900)
 #  if defined(BOOST_ASSERT_CONFIG)
-#     error "Unknown compiler version - please run the configure tests and report the results"
+#     error "boost: Unknown compiler version - please run the configure tests and report the results"
 #  else
-#     pragma message("Unknown compiler version - please run the configure tests and report the results")
+#     pragma message("boost: Unknown compiler version - please run the configure tests and report the results")
 #  endif
 #endif