diff --git a/powerline/ext/vim/source_plugin.vim b/powerline/ext/vim/source_plugin.vim
index 87e8b12c..84be659e 100644
--- a/powerline/ext/vim/source_plugin.vim
+++ b/powerline/ext/vim/source_plugin.vim
@@ -8,4 +8,4 @@ endif
 python import sys, vim
 python sys.path.append(vim.eval('expand("<sfile>:h:h:h:h")'))
 
-exec 'source '. fnameescape(expand('<sfile>:h') . '/powerline.vim')
+source <sfile>:h/powerline.vim