diff --git a/Library/Homebrew/rubocops/patches.rb b/Library/Homebrew/rubocops/patches.rb
index 9095bf38c1..c2171b4d63 100644
--- a/Library/Homebrew/rubocops/patches.rb
+++ b/Library/Homebrew/rubocops/patches.rb
@@ -57,7 +57,7 @@ module RuboCop
           if match_obj = regex_match_group(patch, gh_patch_diff_pattern)
             problem <<~EOS
               use GitHub pull request URLs:
-                https://github.com/#{match_obj[1]}/#{match_obj[2]}/pull/#{match_obj[3]}.patch
+                https://github.com/#{match_obj[1]}/#{match_obj[2]}/pull/#{match_obj[3]}.patch?full_index=1
               Rather than patch-diff:
                 #{patch_url}
             EOS
diff --git a/Library/Homebrew/test/rubocops/patches_spec.rb b/Library/Homebrew/test/rubocops/patches_spec.rb
index 77c72638c9..d2ed6ce03a 100644
--- a/Library/Homebrew/test/rubocops/patches_spec.rb
+++ b/Library/Homebrew/test/rubocops/patches_spec.rb
@@ -94,7 +94,7 @@ describe RuboCop::Cop::FormulaAudit::Patches do
           [{ message:
                        <<~EOS,
                          use GitHub pull request URLs:
-                           https://github.com/foo/foo-bar/pull/100.patch
+                           https://github.com/foo/foo-bar/pull/100.patch?full_index=1
                          Rather than patch-diff:
                            https://patch-diff.githubusercontent.com/raw/foo/foo-bar/pull/100.patch
                        EOS
@@ -231,7 +231,7 @@ describe RuboCop::Cop::FormulaAudit::Patches do
           [{ message:
                        <<~EOS,
                          use GitHub pull request URLs:
-                           https://github.com/foo/foo-bar/pull/100.patch
+                           https://github.com/foo/foo-bar/pull/100.patch?full_index=1
                          Rather than patch-diff:
                            https://patch-diff.githubusercontent.com/raw/foo/foo-bar/pull/100.patch
                        EOS