diff --git a/remote/github/convert.go b/remote/github/convert.go
index 798e8930..84ec72e1 100644
--- a/remote/github/convert.go
+++ b/remote/github/convert.go
@@ -237,7 +237,7 @@ func convertPullHook(from *webhook, merge bool) *model.Build {
 		Commit:  from.PullRequest.Head.SHA,
 		Link:    from.PullRequest.HTMLURL,
 		Ref:     fmt.Sprintf(headRefs, from.PullRequest.Number),
-		Branch:  from.PullRequest.Head.Ref,
+		Branch:  from.PullRequest.Base.Ref,
 		Message: from.PullRequest.Title,
 		Author:  from.PullRequest.User.Login,
 		Avatar:  from.PullRequest.User.Avatar,
diff --git a/remote/github/convert_test.go b/remote/github/convert_test.go
index 711bd441..dd8ea80f 100644
--- a/remote/github/convert_test.go
+++ b/remote/github/convert_test.go
@@ -184,7 +184,7 @@ func Test_helper(t *testing.T) {
 
 			build := convertPullHook(from, true)
 			g.Assert(build.Event).Equal(model.EventPull)
-			g.Assert(build.Branch).Equal(from.PullRequest.Head.Ref)
+			g.Assert(build.Branch).Equal(from.PullRequest.Base.Ref)
 			g.Assert(build.Ref).Equal("refs/pull/42/merge")
 			g.Assert(build.Refspec).Equal("changes:master")
 			g.Assert(build.Remote).Equal("https://github.com/octocat/hello-world-fork")