diff --git a/source/Makefile.mk b/source/Makefile.mk
index 4c73b9211..df1d69e2a 100644
--- a/source/Makefile.mk
+++ b/source/Makefile.mk
@@ -84,8 +84,8 @@ BASE_FLAGS += -DNDEBUG $(BASE_OPTS) -fvisibility=hidden
 CXXFLAGS   += -fvisibility-inlines-hidden
 endif
 
-ifneq ($(MACOS),true)
-ifneq ($(WIN32),true)
+ifneq ($(MACOS_OR_WIN32),true)
+ifneq ($(BSD),true)
 BASE_FLAGS += -fno-gnu-unique
 endif
 endif