diff --git a/SmoulderingBeachBall/InternalServices.fs b/SmoulderingBeachBall/InternalServices.fs
index 5844f54..96e11f2 100644
--- a/SmoulderingBeachBall/InternalServices.fs
+++ b/SmoulderingBeachBall/InternalServices.fs
@@ -28,8 +28,8 @@
             let width = float32 imgWidth
             let height = float32 imgHeight
             if (width >= height) then
-                width * (float32 0.05)
-            else height * (float32 0.05)
+                height * (float32 0.05)
+            else width * (float32 0.05)
 
         let createBorderPath penWidth spec =
             let offset =  penOffset penWidth