diff --git a/CHANGELOG.md b/CHANGELOG.md
index e11bc197..583111a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 Version 177:
 
 * Add test for issue #1188
+* Set /permissive-
 
 --------------------------------------------------------------------------------
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4fceab9f..bfe53b12 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ if (MSVC)
 
     add_compile_options(
         /bigobj       # large object file format
-        #/permissive-  # strict C++
+        /permissive-  # strict C++
         #/wd4503      # decorated name length exceeded, name was truncated
         /W4           # enable all warnings
         /MP           # Multi-processor compilation
diff --git a/Jamfile b/Jamfile
index 85d5e1d0..a96279a8 100644
--- a/Jamfile
+++ b/Jamfile
@@ -88,7 +88,7 @@ project /boost/beast
     <define>BOOST_ASIO_DISABLE_BOOST_REGEX=1
     #<define>BOOST_ASIO_NO_DEPRECATED=1 # some tests use deprecated strand
     <define>BOOST_COROUTINES_NO_DEPRECATION_WARNING=1
-    <toolset>msvc:<cxxflags>"/bigobj"
+    <toolset>msvc:<cxxflags>"/bigobj /permissive-"
     <toolset>msvc:<define>_SCL_SECURE_NO_WARNINGS=1
     <toolset>msvc:<define>_CRT_SECURE_NO_WARNINGS=1
     <toolset>msvc,<variant>release:<cxxflags>"/Ob2 /Oi /Ot"