diff --git a/plugin/makecols.vim b/plugin/makecols.vim
index d6d65c2..e064e90 100644
--- a/plugin/makecols.vim
+++ b/plugin/makecols.vim
@@ -18,7 +18,7 @@ endfunction
 
 
 if !exists("g:makecols_no_mappings") || ! g:makecols_no_mappings
-    nmap mc :call makecols()
+    nmap mc :call <SID>makecols()<CR>
 endif