diff --git a/doc/tips/powerful_file_matching.mdwn b/doc/tips/powerful_file_matching.mdwn
index d5d29377c4..47f8c8a64c 100644
--- a/doc/tips/powerful_file_matching.mdwn
+++ b/doc/tips/powerful_file_matching.mdwn
@@ -1,4 +1,4 @@
-git-annex has a powerful syntax for making it act on only certian files.
+git-annex has a powerful syntax for making it act on only certain files.
 
 The simplest thing is to exclude some files, using wild cards: