diff --git a/projects/mtg/src/GuiMana.cpp b/projects/mtg/src/GuiMana.cpp
index 57a6d694c..3f1fbaac2 100644
--- a/projects/mtg/src/GuiMana.cpp
+++ b/projects/mtg/src/GuiMana.cpp
@@ -258,7 +258,7 @@ void GuiMana::RenderStatic()
         return;
 
     float x0 = x - 20 * totalColors;
-    x0 = max(40, x0);
+    x0 = max(40.f, x0);
     float xEnd = x0 + 20 * totalColors;
     r->FillRoundRect(x0, y - 5, static_cast<float> (20 * totalColors + 5), 20, 2, ARGB(128,0,0,0));