diff --git a/lib/rouge/lexers/robot_framework.rb b/lib/rouge/lexers/robot_framework.rb
index 3675594fc3..cc0fbbfe49 100644
--- a/lib/rouge/lexers/robot_framework.rb
+++ b/lib/rouge/lexers/robot_framework.rb
@@ -10,7 +10,7 @@ class RobotFramework < RegexLexer
       title "Robot Framework"
       desc 'Robot Framework is a generic open source automation testing framework (robotframework.org)'
 
-      filenames '*.robot'
+      filenames '*.robot', '*.resource'
       mimetypes 'text/x-robot'
 
       def initialize(opts = {})
diff --git a/spec/lexers/robot_framework_spec.rb b/spec/lexers/robot_framework_spec.rb
index 18ed1dc27b..f88bcf2910 100644
--- a/spec/lexers/robot_framework_spec.rb
+++ b/spec/lexers/robot_framework_spec.rb
@@ -8,6 +8,7 @@
 
     it 'guesses by filename' do
       assert_guess :filename => 'foo.robot'
+      assert_guess :filename => 'foo.resource'
     end
 
     it 'guesses by mimetype' do