diff --git a/Ruby/lib/terminal-notifier.rb b/Ruby/lib/terminal-notifier.rb
index 46d8a5f..93e3298 100644
--- a/Ruby/lib/terminal-notifier.rb
+++ b/Ruby/lib/terminal-notifier.rb
@@ -25,7 +25,7 @@ def self.execute(verbose, options)
       end
       result
     else
-      raise UnsupportedPlatformError, "Warning: terminal-notifier is only supported on Mac OS X 10.8, or higher."
+      raise UnsupportedPlatformError, "terminal-notifier is only supported on Mac OS X 10.8, or higher."
     end
   end