diff --git a/src/calibre/gui2/fts/search.py b/src/calibre/gui2/fts/search.py
index 37e98b4e49..a71d8b8fc5 100644
--- a/src/calibre/gui2/fts/search.py
+++ b/src/calibre/gui2/fts/search.py
@@ -339,13 +339,13 @@ class SearchInputPanel(QWidget):
             ' library screen. This means that any Virtual libraries or search results'
             ' are applied.'))
         r.setChecked(gprefs['fts_library_restrict_books'])
-        r.stateChanged.connect(lambda state: gprefs.set('fts_library_restrict_books', state != Qt.CheckState.Unchecked))
+        r.stateChanged.connect(lambda state: gprefs.set('fts_library_restrict_books', state != Qt.CheckState.Unchecked.value))
         self.related = rw = QCheckBox(_('&Match on related words'))
         rw.setToolTip('<p>' + _(
             'With this option searching for words will also match on any related words (supported in several languages). For'
             ' example, in the English language: <i>correction</i> matches <i>correcting</i> and <i>corrected</i> as well'))
         rw.setChecked(gprefs['fts_library_use_stemmer'])
-        rw.stateChanged.connect(lambda state: gprefs.set('fts_library_use_stemmer', state != Qt.CheckState.Unchecked))
+        rw.stateChanged.connect(lambda state: gprefs.set('fts_library_use_stemmer', state != Qt.CheckState.Unchecked.value))
         self.summary = s = QLabel(self)
         h1.addWidget(r), h1.addWidget(rw), h1.addWidget(s), h1.addStretch()
 
diff --git a/src/calibre/gui2/library/annotations.py b/src/calibre/gui2/library/annotations.py
index 52898cfefb..08af59130a 100644
--- a/src/calibre/gui2/library/annotations.py
+++ b/src/calibre/gui2/library/annotations.py
@@ -946,7 +946,7 @@ class AnnotationsBrowser(Dialog):
         us.setToolTip('<p>' + _(
             'With this option searching for words will also match on any related words (supported in several languages). For'
             ' example, in the English language: <i>correction</i> matches <i>correcting</i> and <i>corrected</i> as well'))
-        us.stateChanged.connect(lambda state: gprefs.set('browse_annots_use_stemmer', state != Qt.CheckState.Unchecked))
+        us.stateChanged.connect(lambda state: gprefs.set('browse_annots_use_stemmer', state != Qt.CheckState.Unchecked.value))
 
         l = QVBoxLayout(self)