diff --git a/syncplay/ui/gui.py b/syncplay/ui/gui.py
index e04918f..7aea0ee 100644
--- a/syncplay/ui/gui.py
+++ b/syncplay/ui/gui.py
@@ -211,7 +211,7 @@ class MainWindow(QtGui.QMainWindow):
                         t = self._syncplayClient.getUserOffset() + sign * t
                 self._syncplayClient.setUserOffset(t)
             else:
-                self.showMessage("Invalid offset value", True)
+                self.showErrorMessage("Invalid offset value")
         
     def openUserGuide(self):
         if sys.platform.startswith('linux'):