diff --git a/cockatrice/src/interface/widgets/general/display/color_bar.cpp b/cockatrice/src/interface/widgets/general/display/color_bar.cpp
index cb73e9ebc..5c9376b3d 100644
--- a/cockatrice/src/interface/widgets/general/display/color_bar.cpp
+++ b/cockatrice/src/interface/widgets/general/display/color_bar.cpp
@@ -134,7 +134,7 @@ QString ColorBar::tooltipForPosition(int x) const
 
         if (x >= pos && x < pos + segmentWidth) {
             double percent = (100.0 * it.value()) / total;
-            return QString("%1: %2 cards (%.1f%)").arg(it.key()).arg(it.value()).arg(percent);
+            return QString("%1: %2 cards (%3%)").arg(it.key()).arg(it.value()).arg(QString::number(percent, 'f', 1));
         }
 
         pos += segmentWidth;