diff --git a/lib/remedy/frame.rb b/lib/remedy/frame.rb
index ead9ea8..7c275e4 100644
--- a/lib/remedy/frame.rb
+++ b/lib/remedy/frame.rb
@@ -193,7 +193,7 @@ def sizeof content
     end
 
     def split line
-      line.split(/\r\n|\n\r|\n|\r/)
+      line.to_s.split(/\r\n|\n\r|\n|\r/)
     end
   end
 end