diff --git a/lib/puppet/type/concat_file.rb b/lib/puppet/type/concat_file.rb
index 59e5c6f85..6a6225e3b 100644
--- a/lib/puppet/type/concat_file.rb
+++ b/lib/puppet/type/concat_file.rb
@@ -142,7 +142,7 @@ def fragment_content(r)
     end
 
     if self[:ensure_newline]
-      fragment_content<<"\n"
+      fragment_content<<"\n" unless fragment_content =~ /\n$/
     end
 
     fragment_content