diff --git a/app/widget/slider/rationalslider.cpp b/app/widget/slider/rationalslider.cpp
index 8cfa2f740..62fd2548c 100644
--- a/app/widget/slider/rationalslider.cpp
+++ b/app/widget/slider/rationalslider.cpp
@@ -138,7 +138,6 @@ QString RationalSlider::ValueToString(const QVariant &v)
 
 QVariant RationalSlider::StringToValue(const QString &s, bool *ok)
 {
-  QVariant v;
   rational r;
   *ok = false;