diff --git a/src/plugins/coreplugin/fancytabwidget.h b/src/plugins/coreplugin/fancytabwidget.h
index 45441df4a5a..6631192736a 100644
--- a/src/plugins/coreplugin/fancytabwidget.h
+++ b/src/plugins/coreplugin/fancytabwidget.h
@@ -101,11 +101,13 @@ public:
         tab->icon = icon;
         tab->text = label;
         m_tabs.insert(index, tab);
+        updateGeometry();
     }
     void setEnabled(int index, bool enabled);
     void removeTab(int index) {
         FancyTab *tab = m_tabs.takeAt(index);
         delete tab;
+        updateGeometry();
     }
     void setCurrentIndex(int index);
     int currentIndex() const { return m_currentIndex; }