diff --git a/repos/base-okl4/src/kernel/okl4/target.mk b/repos/base-okl4/src/kernel/okl4/target.mk
index f971c7c2a..1114517b2 100644
--- a/repos/base-okl4/src/kernel/okl4/target.mk
+++ b/repos/base-okl4/src/kernel/okl4/target.mk
@@ -16,3 +16,6 @@ LD_SCRIPT_STATIC = $(REP_DIR)/contrib/generated/x86/linker.ld
 $(TARGET): dummy.c
 dummy.c:
 	@touch $@
+
+clean:
+	$(VERBOSE)rm -rf $(BUILD_BASE_DIR)/tool/okl4