diff --git a/widgets/RestrictedSpinBox.cpp b/widgets/RestrictedSpinBox.cpp
index 3d18ce488..0c71634bb 100644
--- a/widgets/RestrictedSpinBox.cpp
+++ b/widgets/RestrictedSpinBox.cpp
@@ -10,7 +10,7 @@ QValidator::State RestrictedSpinBox::validate (QString& input, int& pos) const
   // start by doing the standard QSpinBox validation
   auto valid = HintedSpinBox::validate (input, pos);
   // extra validation
-  if (QValidator::Acceptable
+  if (QValidator::Acceptable == valid
       && values ().end () == std::find (values ().begin (), values ().end (), valueFromText (input)))
     {
       valid = QValidator::Intermediate;