diff --git a/src/calibre/utils/rapydscript.py b/src/calibre/utils/rapydscript.py
index 7b11c52c42..675a71d210 100644
--- a/src/calibre/utils/rapydscript.py
+++ b/src/calibre/utils/rapydscript.py
@@ -205,7 +205,7 @@ def ok_to_import_webengine():
     from qt.core import QApplication
     if QApplication.instance() is None:
         return True
-    if 'PyQt6.QtWebEngineWidgets' in sys.modules:
+    if 'PyQt6.QtWebEngineCore' in sys.modules:
         return True
     return False