diff --git a/Library/Homebrew/rubocops/lines_cop.rb b/Library/Homebrew/rubocops/lines_cop.rb
index 5ed9acc93f..b6567466ac 100644
--- a/Library/Homebrew/rubocops/lines_cop.rb
+++ b/Library/Homebrew/rubocops/lines_cop.rb
@@ -309,11 +309,11 @@ module RuboCop
             problem "Don't duplicate 'with': Use `build.with? \"#{match[1]}\"` to check for \"--with-#{match[1]}\""
           end
 
-          # find_instance_method_call(body_node, :build, :include?) do |m|
-          #   arg = parameters(m).first
-          #   next unless match = regex_match_group(arg, %r{with(out)?-(.*)})
-          #   problem "Use build.with#{match[1]}? \"#{match[2]}\" instead of build.include? 'with#{match[1]}-#{match[2]}'"
-          # end
+          find_instance_method_call(body_node, :build, :include?) do |m|
+            arg = parameters(m).first
+            next unless match = regex_match_group(arg, %r{with(out)?-(.*)})
+            problem "Use build.with#{match[1]}? \"#{match[2]}\" instead of build.include? 'with#{match[1]}-#{match[2]}'"
+          end
           #
           # find_instance_method_call(body_node, :build, :include?) do |m|
           #   arg = parameters(m).first
diff --git a/Library/Homebrew/test/rubocops/lines_cop_spec.rb b/Library/Homebrew/test/rubocops/lines_cop_spec.rb
index 273014cf1f..36c6272b38 100644
--- a/Library/Homebrew/test/rubocops/lines_cop_spec.rb
+++ b/Library/Homebrew/test/rubocops/lines_cop_spec.rb
@@ -763,6 +763,30 @@ describe RuboCop::Cop::FormulaAudit::Miscellaneous do
         expect_offense(expected, actual)
       end
     end
+
+    it "with build.include?" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          desc "foo"
+          url 'http://example.com/foo-1.0.tgz'
+          def post_install
+            return if build.include? "without-bar"
+          end
+        end
+      EOS
+
+      expected_offenses = [{  message: "Use build.without? \"bar\" instead of build.include? 'without-bar'",
+                              severity: :convention,
+                              line: 5,
+                              column: 30,
+                              source: source }]
+
+      inspect_source(cop, source)
+
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
   end
   def expect_offense(expected, actual)
     expect(actual.message).to eq(expected[:message])