diff --git a/os/common/startup/ARMCMx/compilers/GCC/mk/rules.mk b/os/common/startup/ARMCMx/compilers/GCC/mk/rules.mk
index 93b3de78b..4f7178de5 100644
--- a/os/common/startup/ARMCMx/compilers/GCC/mk/rules.mk
+++ b/os/common/startup/ARMCMx/compilers/GCC/mk/rules.mk
@@ -275,9 +275,9 @@ clean: CLEAN_RULE_HOOK
 	@echo Cleaning
 	@echo - $(DEPDIR)
 	@-rm -fR $(DEPDIR)/* $(BUILDDIR)/* 2>/dev/null
-	@-if [ -d "$(DEPDIR)" ]; then rmdir -p $(subst ./,,$(DEPDIR)) 2>/dev/null; fi
+	@-if [ -d "$(DEPDIR)" ]; then rmdir -p --ignore-fail-on-non-empty $(subst ./,,$(DEPDIR)) 2>/dev/null; fi
 	@echo - $(BUILDDIR)
-	@-if [ -d "$(BUILDDIR)" ]; then rmdir -p $(subst ./,,$(BUILDDIR)) 2>/dev/null; fi
+	@-if [ -d "$(BUILDDIR)" ]; then rmdir -p --ignore-fail-on-non-empty $(subst ./,,$(BUILDDIR)) 2>/dev/null; fi
 	@echo
 	@echo Done