diff --git a/pages/osx/split.md b/pages/osx/split.md
index 0400d951a9..3cfc857cfb 100644
--- a/pages/osx/split.md
+++ b/pages/osx/split.md
@@ -8,7 +8,7 @@
 
 - Split a file by a regular expression. The matching line will be the first line of the next output file:
 
-`split -p {{cat|[d|h]og}} {{filename}}`
+`split -p {{cat|^[dh]og}} {{filename}}`
 
 - Split a file with 512 bytes in each split (except the last split; use 512k for kilobytes and 512m for megabytes):