diff --git a/Jamroot b/Jamroot
index 4118248c1..c8b28445e 100644
--- a/Jamroot
+++ b/Jamroot
@@ -111,7 +111,7 @@ external-lib z ;
 
 #lib dl : : <runtime-link>static:<link>static <runtime-link>shared:<link>shared ;
 #requirements += <library>dl ;
-#requirements += <cxxflags>-std=c++0x ;
+requirements += <cxxflags>-std=c++0x ;
 
 # Allow moses to report the git commit hash of the version used for compilation
 moses_githash = [ _shell "git describe --dirty" ] ;