diff --git a/Makefile b/Makefile
index 411a144..7ee8811 100644
--- a/Makefile
+++ b/Makefile
@@ -52,5 +52,5 @@ clean:
 %.a: %.c *.h
 	$(CC) $(CFLAGS) -c $<
 
-%.a: %.asm
+%.a: %.asm $(MACROS)
 	$(CC) $(CFLAGS) -c $<