diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index 756a951459..054c52e90a 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -340,7 +340,7 @@ __git_ps1 ()
 			   [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
 			   [ -n "$(git ls-files --others --exclude-standard)" ]
 			then
-				u="%"
+				u="%${ZSH_VERSION+%}"
 			fi
 
 			if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then