diff --git a/src/DotRecast.Recast/RcLayers.cs b/src/DotRecast.Recast/RcLayers.cs
index 6b92f6b..e8b5911 100644
--- a/src/DotRecast.Recast/RcLayers.cs
+++ b/src/DotRecast.Recast/RcLayers.cs
@@ -29,9 +29,6 @@ namespace DotRecast.Recast
 
     public static class RcLayers
     {
-        const int RC_MAX_LAYERS = RcRecast.RC_NOT_CONNECTED;
-        const int RC_MAX_NEIS = 16;
-
         private static void AddUnique(List<int> a, int v)
         {
             if (!a.Contains(v))
diff --git a/src/DotRecast.Recast/RcRecast.cs b/src/DotRecast.Recast/RcRecast.cs
index 39bef31..146d91f 100644
--- a/src/DotRecast.Recast/RcRecast.cs
+++ b/src/DotRecast.Recast/RcRecast.cs
@@ -49,6 +49,11 @@ namespace DotRecast.Recast
         /// The number of spans allocated per span spool.
         /// @see rcSpanPool
         public const int RC_SPANS_PER_POOL = 2048;
+        
+        // Must be 255 or smaller (not 256) because layer IDs are stored as
+        // a byte where 255 is a special value.
+        public const int RC_MAX_LAYERS = RC_NOT_CONNECTED;
+        public const int RC_MAX_NEIS = 16;
 
         /// Heighfield border flag.
         /// If a heightfield region ID has this bit set, then the region is a border