Fix compatibility with Qt before 5.10

1 files changed, 1 insertions, 1 deletions

diff --git a/user.cpp b/user.cpp
index 6cc2e0a5..7217413b 100644
--- a/user.cpp
+++ b/user.cpp
@@ -70,7 +70,7 @@ QString User::id() const
 
 bool User::isGuest() const
 {
-    Q_ASSERT(!d->userId.isEmpty() && d->userId.front() == '@');
+    Q_ASSERT(!d->userId.isEmpty() && d->userId.startsWith('@'));
     auto it = std::find_if_not(d->userId.begin() + 1, d->userId.end(),
                                std::mem_fn(&QChar::isDigit));
     Q_ASSERT(it == d->userId.end());