diff --git a/Makefile b/Makefile
index b78f14e1c..2c5b0423a 100644
--- a/Makefile
+++ b/Makefile
@@ -300,7 +300,7 @@ ifdef LLAMA_METAL
 
 ggml-metal.o: ggml/src/ggml-metal/ggml-metal.m ggml/include/ggml-metal.h
 	@echo "== Preparing merged Metal file =="
-	@sed -e '/#include "ggml-common.h"/r ggml/src/ggml-common.h' -e '/#include "ggml-common.h"/d' < ggml/src/ggml-metal/ggml-metal.metal > ggml/src/ggml-metal-merged.metal
+	@sed -e '/#include "..\/ggml-common.h"/r ggml/src/ggml-common.h' -e '/#include "..\/ggml-common.h"/d' < ggml/src/ggml-metal/ggml-metal.metal > ggml/src/ggml-metal-merged.metal
 	@cp ggml/src/ggml-metal-merged.metal ./ggml-metal-merged.metal
 	$(CC) $(CFLAGS) -c $< -o $@
 endif # LLAMA_METAL