diff --git a/src/plugins/coreplugin/manhattanstyle.cpp b/src/plugins/coreplugin/manhattanstyle.cpp
index d4a4cdbe6f5..bf182d80b8a 100644
--- a/src/plugins/coreplugin/manhattanstyle.cpp
+++ b/src/plugins/coreplugin/manhattanstyle.cpp
@@ -409,7 +409,7 @@ int ManhattanStyle::styleHint(StyleHint hint, const QStyleOption *option, const
             ret = QFormLayout::AllNonFixedFieldsGrow;
         break;
     case QStyle::SH_Widget_Animation_Duration:
-        if (widget->inherits("QTreeView"))
+        if (widget && widget->inherits("QTreeView"))
             ret = 0;
         break;
     default: