diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index eb5fd47..7c3a753 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -515,7 +515,7 @@
 # argument, and using the options specified in the second argument.
 __git_ls_files_helper ()
 {
-	if [ "$2" == "--committable" ]; then
+	if [ "$2" = "--committable" ]; then
 		__git -C "$1" -c core.quotePath=false diff-index \
 			--name-only --relative HEAD -- "${3//\\/\\\\}*"
 	else