diff --git a/openwrt/target/linux/package/openswan/Makefile b/openwrt/target/linux/package/openswan/Makefile
index 229ebbc30e..5afec1b3d2 100644
--- a/openwrt/target/linux/package/openswan/Makefile
+++ b/openwrt/target/linux/package/openswan/Makefile
@@ -30,7 +30,7 @@ $(PKG_BUILD_DIR)/.built:
 		ARCH="$(LINUX_KARCH)" \
 		CROSS_COMPILE="$(TARGET_CROSS)" \
 		USERCOMPILE="$(FLAGS)" \
-		AS="$(TARGET_CC) $(TARGET_CFLAGS)" \
+		AS="$(TARGET_CC) -c $(TARGET_CFLAGS)" \
 		module
 
 $(IPKG_KMOD_OPENSWAN):