--- Source/WebCore/rendering/shapes/BoxShape.cpp.orig	2017-03-02 05:14:04.084352267 +0000
+++ Source/WebCore/rendering/shapes/BoxShape.cpp	2017-03-01 10:34:54.764377882 +0000
@@ -43,7 +43,7 @@
 
     LayoutUnit ratio = radius / margin;
     if (ratio < 1)
-        return radius + (margin * (1 + pow(ratio - 1, 3)));
+        return radius + (margin * (1 + pow((double)(ratio - 1), (double)(3))));
 
     return radius + margin;
 }