From f031a6d16427240c60bea04c9271a4a0562ecb7c Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Thu, 14 Jun 2018 11:22:04 +1000
Subject: [PATCH] Fix ImageMaths change.

---
 src/ImageSharp/Common/Helpers/ImageMaths.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ImageSharp/Common/Helpers/ImageMaths.cs b/src/ImageSharp/Common/Helpers/ImageMaths.cs
index 819fa4d700..641b7f3906 100644
--- a/src/ImageSharp/Common/Helpers/ImageMaths.cs
+++ b/src/ImageSharp/Common/Helpers/ImageMaths.cs
@@ -38,7 +38,7 @@ namespace SixLabors.ImageSharp
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static int GetBitsNeededForColorDepth(int colors)
         {
-            return Math.Min(1, (int)Math.Ceiling(Math.Log(colors, 2)));
+            return Math.Max(1, (int)Math.Ceiling(Math.Log(colors, 2)));
         }
 
         /// <summary>