diff --git a/Library/Homebrew/formula_cellar_checks.rb b/Library/Homebrew/formula_cellar_checks.rb
index 9e5012a6da..70c3251721 100644
--- a/Library/Homebrew/formula_cellar_checks.rb
+++ b/Library/Homebrew/formula_cellar_checks.rb
@@ -373,7 +373,7 @@ module FormulaCellarChecks
     universal_binaries_expected = if (formula_tap = formula.tap).present? && formula_tap.core_tap?
       formula_name = formula.name
       # Apply audit exception to versioned formulae too from the unversioned name.
-      formula_name.gsub!(/@\d+(\.\d+)*$/, "") if formula.versioned_formula?
+      formula_name = formula_name.gsub(/@\d+(\.\d+)*$/, "") if formula.versioned_formula?
       formula_tap.audit_exception(:universal_binary_allowlist, formula_name)
     else
       true