diff --git a/include/boost/config/stdlib/libstdcpp3.hpp b/include/boost/config/stdlib/libstdcpp3.hpp
index ab9797bb..75bfc4aa 100644
--- a/include/boost/config/stdlib/libstdcpp3.hpp
+++ b/include/boost/config/stdlib/libstdcpp3.hpp
@@ -68,7 +68,7 @@
                         || defined(unix)      \
                         || defined(__APPLE__) \
                         || defined(__APPLE)   \
-                        || defined(APPLE)
+                        || defined(APPLE))
 #  include <unistd.h>
 #endif
 
diff --git a/include/boost/config/stdlib/sgi.hpp b/include/boost/config/stdlib/sgi.hpp
index a1a6e7a8..5731fe5e 100644
--- a/include/boost/config/stdlib/sgi.hpp
+++ b/include/boost/config/stdlib/sgi.hpp
@@ -46,7 +46,7 @@
                         || defined(unix)      \
                         || defined(__APPLE__) \
                         || defined(__APPLE)   \
-                        || defined(APPLE)
+                        || defined(APPLE))
 #  include <unistd.h>
 #endif
 
diff --git a/include/boost/config/stdlib/stlport.hpp b/include/boost/config/stdlib/stlport.hpp
index 66aaaaaf..85176a4d 100644
--- a/include/boost/config/stdlib/stlport.hpp
+++ b/include/boost/config/stdlib/stlport.hpp
@@ -22,7 +22,7 @@
                         || defined(unix)      \
                         || defined(__APPLE__) \
                         || defined(__APPLE)   \
-                        || defined(APPLE)
+                        || defined(APPLE))
 #  include <unistd.h>
 #endif
 
diff --git a/include/boost/config/stdlib/vacpp.hpp b/include/boost/config/stdlib/vacpp.hpp
index b61efa98..3fcf6e05 100644
--- a/include/boost/config/stdlib/vacpp.hpp
+++ b/include/boost/config/stdlib/vacpp.hpp
@@ -18,7 +18,7 @@
                         || defined(unix)      \
                         || defined(__APPLE__) \
                         || defined(__APPLE)   \
-                        || defined(APPLE)
+                        || defined(APPLE))
 #  include <unistd.h>
 #endif