diff --git a/scripts/check_missing_reboot_apps.exs b/scripts/check_missing_reboot_apps.exs
index d9933e099..91d4b39ea 100755
--- a/scripts/check_missing_reboot_apps.exs
+++ b/scripts/check_missing_reboot_apps.exs
@@ -24,10 +24,10 @@ apps =
 
 :xref.start(:xref)
 :xref.set_default(:xref, warnings: false)
-rel_dir = '_build/#{profile}/lib/'
+rel_dir = ~c"_build/#{profile}/lib/"
 :xref.add_release(:xref, rel_dir)
 
-{:ok, calls} = :xref.q(:xref, '(App) (XC | [#{Enum.join(apps, ",")}] || mria:create_table/_)')
+{:ok, calls} = :xref.q(:xref, ~c"(App) (XC | [#{Enum.join(apps, ",")}] || mria:create_table/_)")
 
 emqx_calls =
   calls