diff --git a/winpython/controlpanel.py b/winpython/controlpanel.py
index fb214805..35af91d2 100644
--- a/winpython/controlpanel.py
+++ b/winpython/controlpanel.py
@@ -115,7 +115,7 @@ def data(self, index, role=Qt.DisplayRole):
         package = self.packages[index.row()]
         column = index.column()
         if role == Qt.CheckStateRole and column == CHECK:
-            return to_qvariant(package in self.checked)
+            return int(package in self.checked)
         elif role == Qt.DisplayRole:
             if column == NAME:
                 return to_qvariant(package.name)