diff --git a/tools/Makefile.cc b/tools/Makefile.cc
index 82165f66ffe..012e91a0af0 100644
--- a/tools/Makefile.cc
+++ b/tools/Makefile.cc
@@ -72,7 +72,7 @@ ifeq ("$(SYSTEM)","unix")
 		ARCH = -DARCH_K8
 		PORT = MacOsX64
 		CSC = mcs
-		MONO =	DYLD_FALLBACK_LIBRARY_PATH=$(LIB_DIR):$(DYLD_LIBRARY_PATH) mono64
+		MONO =	DYLD_FALLBACK_LIBRARY_PATH=$(LIB_DIR):$(DYLD_LIBRARY_PATH) mono
 		NETPLATFORM = x64
 		LIB_SUFFIX = dylib
 	endif