diff --git a/hash/test/Jamfile.v2 b/hash/test/Jamfile.v2
index ff149a7..d037847 100644
--- a/hash/test/Jamfile.v2
+++ b/hash/test/Jamfile.v2
@@ -10,6 +10,8 @@ project hash-tests
         <toolset>gcc:<define>_GLIBCXX_DEBUG
         <toolset>gcc:<cxxflags>-Wsign-promo
         #<toolset>gcc:<cxxflags>-Wextra
+        <toolset>darwin:<define>_GLIBCXX_DEBUG
+        <toolset>darwin:<cxxflags>-Wsign-promo
     ;
 
 test-suite functional/hash