--- a/eric6/E5Gui/E5ModelMenu.py	Wed Jan 08 18:57:10 2020 +0100
+++ b/eric6/E5Gui/E5ModelMenu.py	Wed Jan 08 18:58:31 2020 +0100
@@ -266,7 +266,10 @@
         """
         fm = QFontMetrics(self.font())
         if self.__maxWidth == -1:
-            self.__maxWidth = fm.width('m') * 30
+            try:
+                self.__maxWidth = fm.horizontalAdvance("m") * 30
+            except AttributeError:
+                self.__maxWidth = fm.width('m') * 30
         smallText = fm.elidedText(text, Qt.ElideMiddle, self.__maxWidth)
         
         return QAction(icon, smallText, parent)