diff --git a/target/sdk/Makefile b/target/sdk/Makefile
index 719b659d25..ecaa015595 100644
--- a/target/sdk/Makefile
+++ b/target/sdk/Makefile
@@ -137,6 +137,7 @@ $(BIN_DIR)/$(SDK_NAME).tar.xz: clean
 	find $(SDK_BUILD_DIR) -name .git | $(XARGS) rm -rf
 	find $(SDK_BUILD_DIR) -name .svn | $(XARGS) rm -rf
 	find $(SDK_BUILD_DIR) -name CVS | $(XARGS) rm -rf
+	-make -C $(SDK_BUILD_DIR)/scripts/config clean
 	(cd $(BUILD_DIR); \
 		tar -I 'xz -7e' -cf $@ $(SDK_NAME); \
 	)