diff --git a/clean_files.txt b/clean_files.txt
index de0f6c1e87..192fefa64f 100644
--- a/clean_files.txt
+++ b/clean_files.txt
@@ -46,6 +46,7 @@ completion/available/dmidecode.completion.bash
 completion/available/docker-machine.completion.bash
 completion/available/docker.completion.bash
 completion/available/dotnet.completion.bash
+completion/available/flutter.completion.bash
 completion/available/gcloud.completion.bash
 completion/available/gem.completion.bash
 completion/available/git.completion.bash
diff --git a/completion/available/flutter.completion.bash b/completion/available/flutter.completion.bash
index 62befc824d..7dde5a0709 100644
--- a/completion/available/flutter.completion.bash
+++ b/completion/available/flutter.completion.bash
@@ -1,5 +1,5 @@
-#!/usr/bin/bash
+# shellcheck shell=bash
 
 if _command_exists flutter; then
-  eval "$(flutter bash-completion)"
+	eval "$(flutter bash-completion)"
 fi