diff --git a/README.md b/README.md
index 214852e..688d835 100644
--- a/README.md
+++ b/README.md
@@ -1080,7 +1080,7 @@ git fetch origin master:refs/remotes/origin/mymaster
 
 ## Find common ancestor of two branches
 ```sh
-diff -u <(git rev-list --first-parent BranchA) <(git rev-list --first-parent BranchB) | sed -ne 's/^ //p' | head -1
+git merge-base <branch-name> <other-branch-name>
 ```
 
 ## List unpushed git commits
diff --git a/tips.json b/tips.json
index ea1ee54..4ecadbe 100644
--- a/tips.json
+++ b/tips.json
@@ -445,7 +445,7 @@
 		"tip": "git fetch origin master:refs/remotes/origin/mymaster"
 	}, {
 		"title": "Find common ancestor of two branches",
-		"tip": "diff -u <(git rev-list --first-parent BranchA) <(git rev-list --first-parent BranchB) | sed -ne 's/^ //p' | head -1"
+		"tip": "git merge-base <branch-name> <other-branch-name>"
 	}, {
 		"title": "List unpushed git commits",
 		"tip": "git log --branches --not --remotes",