diff --git a/Formula/gearman.rb b/Formula/gearman.rb
index e445aa7c0da..3ac72ff04c3 100644
--- a/Formula/gearman.rb
+++ b/Formula/gearman.rb
@@ -34,7 +34,7 @@ class Gearman < Formula
   def install
     # https://bugs.launchpad.net/gearmand/+bug/1368926
     Dir["tests/**/*.cc", "libtest/main.cc"].each do |test_file|
-      next unless /std::unique_ptr/ === File.read(test_file)
+      next unless /std::unique_ptr/ =~ File.read(test_file)
       inreplace test_file, "std::unique_ptr", "std::auto_ptr"
     end