diff --git a/vimrc b/vimrc
index a3534448..d9145d60 100644
--- a/vimrc
+++ b/vimrc
@@ -32,9 +32,9 @@ set colorcolumn=+1
 au BufRead,BufNewFile *.ipynb setlocal filetype=json
 au BufRead,BufNewFile *.md setlocal spell
 syntax on
-" if &diff
-"         syntax off
-" endif
+if &diff
+        syntax off
+endif
 
 set expandtab
 set autoindent