diff --git a/config b/config
index 8699389..578ccca 100644
--- a/config
+++ b/config
@@ -80,6 +80,10 @@
     cleanuplocal = !git remote prune origin && git gc && git clean -df
 
     unstage = reset HEAD --
+
+    # Check if any file in repo has whitespace errors
+    # As described in http://peter.eisentraut.org/blog/2014/11/04/checking-whitespace-with-git/
+    check-whitespace = !git diff-tree --check $(git hash-object -t tree /dev/null) HEAD
 [apply]
     whitespace = nowarn
 [core]