diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 019026efc..72a31827e 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1298,7 +1298,7 @@ _git_gitk ()
 }
 
 __git_match_ctag() {
-	awk "/^${1////\\/}/ { print \$1 }" "$2"
+	awk "/^${1//\//\\/}/ { print \$1 }" "$2"
 }
 
 _git_grep ()