diff --git a/contrib/src/main.mak b/contrib/src/main.mak
index 1c3d1f963cc6d17f623e7a83c6cfe3ab14a9d789..86abd19dae2ef3a9d6d4b612021aaf488e79afa5 100644
--- a/contrib/src/main.mak
+++ b/contrib/src/main.mak
@@ -475,9 +475,9 @@ ifdef HAVE_WIN32
 endif
 ifdef HAVE_DARWIN_OS
 	echo "set(CMAKE_SYSTEM_NAME Darwin)" >> $@
-	echo "set(CMAKE_C_FLAGS $(CFLAGS))" >> $@
-	echo "set(CMAKE_CXX_FLAGS $(CFLAGS))" >> $@
-	echo "set(CMAKE_LD_FLAGS $(LDFLAGS))" >> $@
+	echo "set(CMAKE_C_FLAGS \"$(CFLAGS)\")" >> $@
+	echo "set(CMAKE_CXX_FLAGS \"$(CXXFLAGS)\")" >> $@
+	echo "set(CMAKE_LD_FLAGS \"$(LDFLAGS)\")" >> $@
 	echo "set(CMAKE_AR ar CACHE FILEPATH "Archiver")" >> $@
 ifdef HAVE_IOS
 	echo "set(CMAKE_OSX_SYSROOT $(IOS_SDK))" >> $@