diff --git a/libr/Makefile b/libr/Makefile
index 15266d8803..1e40c758b6 100644
--- a/libr/Makefile
+++ b/libr/Makefile
@@ -93,7 +93,7 @@ ifeq (1,1)
 		( cd .libr2/$$BN ; pwd ; du -hs ../../$$LIB; ${AR} -x ../../$$LIB ) ; \
 	done
 
-ifeq ($(shell uname),Darwin)
+ifeq ($(OSTYPE),darwin)
 WHOLEFLAG=-all_load
 else
 WHOLEFLAG=-Wl,--whole-archive