diff --git a/src/Makefile b/src/Makefile
index 0d9f8f8..1acd5b9 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -29,7 +29,7 @@ ifeq ($(OPTIMIZATION),-O3)
 	ifeq (clang,$(CLANG))
 		OPTIMIZATION+=-flto
 	else
-		OPTIMIZATION+=-flto=auto
+		OPTIMIZATION+=-flto
 	endif
 endif
 ifneq ($(OPTIMIZATION),-O0)