1 files changed, 10 insertions, 3 deletions
diff --git a/activesupport/lib/active_support/clean_logger.rb b/activesupport/lib/active_support/clean_logger.rb
index d0de1188f0..07162f1d44 100644
--- a/activesupport/lib/active_support/clean_logger.rb
+++ b/activesupport/lib/active_support/clean_logger.rb
@@ -10,7 +10,14 @@ class Logger #:nodoc:
   end
 
   private
-    def format_message(severity, timestamp, msg, progname)
-      "#{msg}\n"
+    # Ruby 1.8.3 swapped the format_message params.
+    if RUBY_VERSION < '1.8.3'
+      def format_message(severity, timestamp, msg, progname)
+        "#{msg}\n"
+      end
+    else
+      def format_message(severity, timestamp, progname, msg)
+        "#{msg}\n"
+      end
     end
-end
-\ No newline at end of file
+end