diff --git a/Library/Homebrew/utils/inreplace.rb b/Library/Homebrew/utils/inreplace.rb
index c2f627ebea..b7e625b6ea 100644
--- a/Library/Homebrew/utils/inreplace.rb
+++ b/Library/Homebrew/utils/inreplace.rb
@@ -40,7 +40,7 @@ module Utils
     sig {
       params(
         paths:        T.any(T::Array[T.untyped], String, Pathname),
-        before:       T.nilable(T.any(Regexp, String)),
+        before:       T.nilable(T.any(Pathname, Regexp, String)),
         after:        T.nilable(T.any(Pathname, String, Symbol)),
         audit_result: T::Boolean,
       ).void