diff --git a/Makefile b/Makefile
index e0c421d5..afe965fa 100644
--- a/Makefile
+++ b/Makefile
@@ -74,7 +74,7 @@ docs: build-docs
 # Rules for build and publish
 
 check-working-tree:
-	@[[ ! -z "`git status -s`" ]] && \
+	@[ ! -z "`git status -s`" ] && \
 	echo "Stopping publish. There are change to commit or discard." && \
 	exit 1