diff --git a/rules.mak b/rules.mak
index 4eb1f9030650007952b6c7dfd04a41d32345c5fc..f8e5b04e55d4343b0e9ec44f53bb3348a60ee848 100644
--- a/rules.mak
+++ b/rules.mak
@@ -17,7 +17,7 @@ QEMU_CFLAGS += -MMD -MP -MT $@
 	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
 
 %.o: %.S
-	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CLAGS) -c -o $@ $<,"  AS    $(TARGET_DIR)$@")
+	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) -c -o $@ $<,"  AS    $(TARGET_DIR)$@")
 
 %.o: %.m
 	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")