diff --git a/src/app/puzzle/scene/vpgraphicstilegrid.cpp b/src/app/puzzle/scene/vpgraphicstilegrid.cpp
index e153b75de..6897c589e 100644
--- a/src/app/puzzle/scene/vpgraphicstilegrid.cpp
+++ b/src/app/puzzle/scene/vpgraphicstilegrid.cpp
@@ -61,7 +61,7 @@ auto OptimizeFontSizeToFitTextInRect(QPainter *painter, const QRectF &drawRect,
             factor = yFactor;
         }
 
-        error = abs(factor-1);
+        error = abs(factor-1.0);
         if (factor > 1 )
         {
             if (error < minError)