diff --git a/src/sbbs3/scfg/GNUmakefile b/src/sbbs3/scfg/GNUmakefile
index 7bce1b33075e01bfdee44a279781f2a6c78eb7f8..f95a3276ccecdd61fd50b6d5c6f6d318fe41b648 100644
--- a/src/sbbs3/scfg/GNUmakefile
+++ b/src/sbbs3/scfg/GNUmakefile
@@ -91,6 +91,10 @@ ifeq ($(os),netbsd)
  CFLAGS	+=	-D__unix__ -I/usr/pkg/include
 endif
 
+ifeq ($(os),darwin)
+ CFLAGS +=  -D__unix__ -D__DARWIN__
+endif
+
 ifdef USE_DIALOG		
  OBJS += $(ODIR)$(SLASH)uifcd.$(OFILE)
 endif