diff --git a/src/DotRecast.Recast/RcBuildContoursFlags.cs b/src/DotRecast.Recast/RcBuildContoursFlags.cs
new file mode 100644
index 0000000..adcdc37
--- /dev/null
+++ b/src/DotRecast.Recast/RcBuildContoursFlags.cs
@@ -0,0 +1,10 @@
+namespace DotRecast.Recast
+{
+    /// Contour build flags.
+    /// @see rcBuildContours
+    public static class RcBuildContoursFlags
+    {
+        public const int RC_CONTOUR_TESS_WALL_EDGES = 0x01; //< Tessellate solid (impassable) edges during contour simplification.
+        public const int RC_CONTOUR_TESS_AREA_EDGES = 0x02; //< Tessellate edges between areas during contour simplification.
+    }
+}
\ No newline at end of file
diff --git a/src/DotRecast.Recast/RcBuilder.cs b/src/DotRecast.Recast/RcBuilder.cs
index e2bd465..e66f831 100644
--- a/src/DotRecast.Recast/RcBuilder.cs
+++ b/src/DotRecast.Recast/RcBuilder.cs
@@ -237,7 +237,7 @@ namespace DotRecast.Recast
             //
 
             // Create contours.
-            RcContourSet cset = RcContours.BuildContours(ctx, chf, cfg.MaxSimplificationError, cfg.MaxEdgeLen, RcConstants.RC_CONTOUR_TESS_WALL_EDGES);
+            RcContourSet cset = RcContours.BuildContours(ctx, chf, cfg.MaxSimplificationError, cfg.MaxEdgeLen, RcBuildContoursFlags.RC_CONTOUR_TESS_WALL_EDGES);
 
             //
             // Step 6. Build polygons mesh from contours.
diff --git a/src/DotRecast.Recast/RcConstants.cs b/src/DotRecast.Recast/RcConstants.cs
index aebf84c..d3fd945 100644
--- a/src/DotRecast.Recast/RcConstants.cs
+++ b/src/DotRecast.Recast/RcConstants.cs
@@ -84,13 +84,6 @@ namespace DotRecast.Recast
         /// @see rcPolyMesh::polys
         public const int RC_MESH_NULL_IDX = 0xffff;
 
-        public const int RC_CONTOUR_TESS_WALL_EDGES = 0x01;
-
-        /// < Tessellate solid (impassable) edges during contour
-        /// simplification.
-        public const int RC_CONTOUR_TESS_AREA_EDGES = 0x02;
-
-
         public const int RC_LOG_WARNING = 1;
     }
 }
\ No newline at end of file
diff --git a/src/DotRecast.Recast/RcContours.cs b/src/DotRecast.Recast/RcContours.cs
index 0c7887b..5fc2584 100644
--- a/src/DotRecast.Recast/RcContours.cs
+++ b/src/DotRecast.Recast/RcContours.cs
@@ -374,7 +374,7 @@ namespace DotRecast.Recast
             }
 
             // Split too long edges.
-            if (maxEdgeLen > 0 && (buildFlags & (RC_CONTOUR_TESS_WALL_EDGES | RC_CONTOUR_TESS_AREA_EDGES)) != 0)
+            if (maxEdgeLen > 0 && (buildFlags & (RcBuildContoursFlags.RC_CONTOUR_TESS_WALL_EDGES | RcBuildContoursFlags.RC_CONTOUR_TESS_AREA_EDGES)) != 0)
             {
                 for (int i = 0; i < simplified.Count / 4;)
                 {
@@ -395,11 +395,16 @@ namespace DotRecast.Recast
                     // Tessellate only outer edges or edges between areas.
                     bool tess = false;
                     // Wall edges.
-                    if ((buildFlags & RC_CONTOUR_TESS_WALL_EDGES) != 0 && (points[ci * 4 + 3] & RC_CONTOUR_REG_MASK) == 0)
+                    if ((buildFlags & RcBuildContoursFlags.RC_CONTOUR_TESS_WALL_EDGES) != 0 && (points[ci * 4 + 3] & RC_CONTOUR_REG_MASK) == 0)
+                    {
                         tess = true;
+                    }
+
                     // Edges between areas.
-                    if ((buildFlags & RC_CONTOUR_TESS_AREA_EDGES) != 0 && (points[ci * 4 + 3] & RC_AREA_BORDER) != 0)
+                    if ((buildFlags & RcBuildContoursFlags.RC_CONTOUR_TESS_AREA_EDGES) != 0 && (points[ci * 4 + 3] & RC_AREA_BORDER) != 0)
+                    {
                         tess = true;
+                    }
 
                     if (tess)
                     {
diff --git a/test/DotRecast.Recast.Test/RecastSoloMeshTest.cs b/test/DotRecast.Recast.Test/RecastSoloMeshTest.cs
index 0e9ac47..ffbbd22 100644
--- a/test/DotRecast.Recast.Test/RecastSoloMeshTest.cs
+++ b/test/DotRecast.Recast.Test/RecastSoloMeshTest.cs
@@ -239,8 +239,7 @@ public class RecastSoloMeshTest
         //
 
         // Create contours.
-        RcContourSet m_cset = RcContours.BuildContours(m_ctx, m_chf, cfg.MaxSimplificationError, cfg.MaxEdgeLen,
-            RcConstants.RC_CONTOUR_TESS_WALL_EDGES);
+        RcContourSet m_cset = RcContours.BuildContours(m_ctx, m_chf, cfg.MaxSimplificationError, cfg.MaxEdgeLen, RcBuildContoursFlags.RC_CONTOUR_TESS_WALL_EDGES);
 
         Assert.That(m_cset.conts.Count, Is.EqualTo(expContours), "Contours");
         //