diff --git a/storage/bolt/users.go b/storage/bolt/users.go
index 33f67abb..f37b707b 100644
--- a/storage/bolt/users.go
+++ b/storage/bolt/users.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"reflect"
+	"regexp"
 
 	"github.com/asdine/storm/v3"
 	"github.com/asdine/storm/v3/q"
@@ -44,7 +45,11 @@ func (st usersBackend) GetBy(i interface{}) (user *users.User, err error) {
 
 func (st usersBackend) GetByScope(scope string) (*users.User, error) {
 	user := &users.User{}
-	err := st.db.Select(q.Eq("Scope", scope)).First(user)
+	// Match case-insensitively: on a case-insensitive filesystem two scopes
+	// that differ only in case (e.g. /users/Alice and /users/alice) resolve to
+	// the same home directory, so they must be treated as a collision.
+	pattern := "(?i)^" + regexp.QuoteMeta(scope) + "$"
+	err := st.db.Select(q.Re("Scope", pattern)).First(user)
 	if err != nil {
 		if errors.Is(err, storm.ErrNotFound) {
 			return nil, fberrors.ErrNotExist