diff --git a/Makefile b/Makefile
index 2e62183..66dc4a9 100644
--- a/Makefile
+++ b/Makefile
@@ -146,7 +146,7 @@ install: check uninstall
 
 clean:
 	@echo "Clean ..."
-	@$(RM) -rd ${CMAKE_BUILD_DIR}
+	@$(RM) -rd "${CMAKE_BUILD_DIR}"
 	@if [[ -d "${CMAKE_BUILD_DIR}" ]]; then \
 	    echo "Clean: error, compile directory exist ${CMAKE_BUILD_DIR}"; \
 	else \