diff --git a/Makefile b/Makefile
index 04edfc682..7129c41e1 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ CC=clang
 OS=$(shell uname)
 
 ifeq ($(OS), Darwin)
-	LDFLAGS=$(LDFLAGS) -liconv
+	LDFLAGS:=$(LDFLAGS) -liconv
 endif
 
 all: debug demo