diff --git a/scripts/make-doc.sh b/scripts/make-doc.sh
index cfe06dc8cdf23..64abe8c3c9e54 100755
--- a/scripts/make-doc.sh
+++ b/scripts/make-doc.sh
@@ -7,6 +7,7 @@ HTML_DIR=${DOC_DIR}/_build/html
 
 # backup the old version's doc as later we do make clean, they all gone.
 cd ${HTML_DIR}
+mkdir -p ../../bak
 rsync -rzvh --ignore-missing-args ./v* ../../bak
 rsync -rzvh --ignore-missing-args ./latest ../../bak
 cd -