diff --git a/dokku b/dokku
index 980b0e9a9..1bc015b85 100755
--- a/dokku
+++ b/dokku
@@ -125,7 +125,7 @@ execute_dokku_cmd() {
   elif [[ -x $PLUGIN_ENABLED_PATH/$PLUGIN_NAME/subcommands/$PLUGIN_CMD ]]; then
     "$PLUGIN_ENABLED_PATH/$PLUGIN_NAME/subcommands/$PLUGIN_CMD" "$@"
     implemented=1
-  elif [[ -x $PLUGIN_ENABLED_PATH/${PLUGIN_NAME%%:*}/subcommands/${1#*:} ]] && [[ "${1#*:}" !== ":" ]]; then
+  elif [[ -x $PLUGIN_ENABLED_PATH/${PLUGIN_NAME%%:*}/subcommands/${1#*:} ]] && [[ "${1#*:}" != ":" ]]; then
     "$PLUGIN_ENABLED_PATH/${PLUGIN_NAME%%:*}/subcommands/${1#*:}" "$@"
     implemented=1
   fi