diff --git a/pkg/gui/branchstack/branchstack.go b/pkg/gui/branchstack/branchstack.go
index 97e88cb31..5455fe442 100644
--- a/pkg/gui/branchstack/branchstack.go
+++ b/pkg/gui/branchstack/branchstack.go
@@ -6,11 +6,11 @@ import (
 	"github.com/samber/lo"
 )
 
-// Returns the branches stacked below the given branch: those whose tip is one
-// of the given commits of the branch that hasn't been merged into a main
-// branch yet. The branch itself and the main branches are left out. The
-// result is in the order in which the tips appear in commits, so the branch
-// closest to the given one comes first.
+// Returns the branches stacked below the branch with the given name: those
+// whose tip is one of the given commits of the branch that hasn't been
+// merged into a main branch yet. The branch itself and the main branches
+// are left out. The result is in the order in which the tips appear in
+// commits, so the branch closest to the given one comes first.
 //
 // A commit counts as merged if the remote branch of a main branch contains it
 // (this is what the commit's status says), but also if the local main branch
@@ -23,12 +23,12 @@ import (
 func BranchesBelow(
 	commits []*models.Commit,
 	branches []*models.Branch,
-	branch *models.Branch,
+	branchName string,
 	mainBranches []string,
 ) []*models.Branch {
 	branchesByTip := map[string][]*models.Branch{}
 	for _, other := range branches {
-		if !lo.Contains(mainBranches, other.Name) && other.Name != branch.Name {
+		if !lo.Contains(mainBranches, other.Name) && other.Name != branchName {
 			branchesByTip[other.CommitHash] = append(branchesByTip[other.CommitHash], other)
 		}
 	}
diff --git a/pkg/gui/branchstack/branchstack_test.go b/pkg/gui/branchstack/branchstack_test.go
index 90a2ead6c..72bd5cb03 100644
--- a/pkg/gui/branchstack/branchstack_test.go
+++ b/pkg/gui/branchstack/branchstack_test.go
@@ -141,7 +141,7 @@ func TestBranchesBelow(t *testing.T) {
 			if s.current != nil {
 				branch = s.current
 			}
-			result := BranchesBelow(s.commits, s.branches, branch, mainBranches)
+			result := BranchesBelow(s.commits, s.branches, branch.Name, mainBranches)
 			names := lo.Map(result, func(b *models.Branch, _ int) string { return b.Name })
 			assert.Equal(t, s.expected, names)
 		})
diff --git a/pkg/gui/controllers/sync_controller.go b/pkg/gui/controllers/sync_controller.go
index 3f4cd4cdd..f4ba5388b 100644
--- a/pkg/gui/controllers/sync_controller.go
+++ b/pkg/gui/controllers/sync_controller.go
@@ -129,7 +129,7 @@ func (self *SyncController) pushCurrentBranch(currentBranch *models.Branch) erro
 // The branches stacked below the current one that have commits to push
 func (self *SyncController) unpushedBranchesBelow(currentBranch *models.Branch) []*models.Branch {
 	branchesBelow := branchstack.BranchesBelow(
-		self.c.Model().Commits, self.c.Model().Branches, currentBranch, self.c.UserConfig().Git.MainBranches)
+		self.c.Model().Commits, self.c.Model().Branches, currentBranch.Name, self.c.UserConfig().Git.MainBranches)
 
 	return lo.Filter(branchesBelow, func(branch *models.Branch, _ int) bool {
 		// Pushing a branch whose remote branch was deleted would recreate it.
@@ -290,7 +290,7 @@ func (self *SyncController) pullCurrentBranch(currentBranch *models.Branch, bran
 // those that diverged from them only because they were rewritten
 func (self *SyncController) updatableBranchesBelow(currentBranch *models.Branch) []*models.Branch {
 	branchesBelow := branchstack.BranchesBelow(
-		self.c.Model().Commits, self.c.Model().Branches, currentBranch, self.c.UserConfig().Git.MainBranches)
+		self.c.Model().Commits, self.c.Model().Branches, currentBranch.Name, self.c.UserConfig().Git.MainBranches)
 
 	return lo.Filter(branchesBelow, func(branch *models.Branch, _ int) bool {
 		// Updating a branch that is checked out in another worktree changes