diff --git a/platform/osx/detect.py b/platform/osx/detect.py
index 08784be8105..5703cbc5465 100644
--- a/platform/osx/detect.py
+++ b/platform/osx/detect.py
@@ -86,7 +86,7 @@ def configure(env):
 		env["LD"]="clang++"
 		if (env["colored"]=="yes"):
 			if sys.stdout.isatty():
-				env.Append(CXXFLAGS=["-fcolor-diagnostics"])
+				env.Append(CPPFLAGS=["-fcolor-diagnostics"])
 
 	import methods