diff --git a/src/calibre/gui2/__init__.py b/src/calibre/gui2/__init__.py
index fdc6779810..8c443dbb40 100644
--- a/src/calibre/gui2/__init__.py
+++ b/src/calibre/gui2/__init__.py
@@ -1047,6 +1047,7 @@ class Application(QApplication):
             prints('Using calibre Qt style:', self.using_calibre_style)
         if self.using_calibre_style:
             self.load_calibre_style()
+            self.setStyleSheet('QTabBar::tab:selected { font-style: italic }')
         self.paletteChanged.connect(self.on_palette_change)
         self.on_palette_change()
 
diff --git a/src/calibre/gui2/tweak_book/ui.py b/src/calibre/gui2/tweak_book/ui.py
index 281d3df3d5..0ce8f2f59c 100644
--- a/src/calibre/gui2/tweak_book/ui.py
+++ b/src/calibre/gui2/tweak_book/ui.py
@@ -76,7 +76,6 @@ class Central(QStackedWidget):  # {{{
         c.setLayout(l)
         l.setContentsMargins(0, 0, 0, 0)
         self.editor_tabs = t = QTabWidget(c)
-        self.editor_tabs.setStyleSheet('QTabBar::tab:selected { font-style: italic }')
         l.addWidget(t)
         t.setDocumentMode(True)
         t.setTabsClosable(True)