diff --git a/Git-subtree.md b/Git-subtree.md
index b2704ca2c..4fd7f8bea 100644
--- a/Git-subtree.md
+++ b/Git-subtree.md
@@ -4,4 +4,4 @@
     git co core
     git merge <tmp_branch>
     git co master
-    git subtree merge -P tmk_core
+    git subtree merge -P tmk_core --squash