diff --git a/OpenSim/Region/Physics/Meshing/Meshmerizer.cs b/OpenSim/Region/Physics/Meshing/Meshmerizer.cs
index 1d1067c76d..3e14fc4edc 100644
--- a/OpenSim/Region/Physics/Meshing/Meshmerizer.cs
+++ b/OpenSim/Region/Physics/Meshing/Meshmerizer.cs
@@ -251,6 +251,8 @@ namespace OpenSim.Region.Physics.Meshing
                 float profileBegin = (float)primShape.ProfileBegin * 2.0e-5f;
                 float profileEnd = 1.0f - (float)primShape.ProfileEnd * 2.0e-5f;
                 float profileHollow = (float)primShape.ProfileHollow * 2.0e-5f;
+                if (profileHollow > 0.95f)
+                    profileHollow = 0.95f;
 
                 int sides = 4;
                 if ((primShape.ProfileCurve & 0x07) == (byte)ProfileShape.EquilateralTriangle)
diff --git a/OpenSim/Region/Physics/Meshing/PrimMesher.cs b/OpenSim/Region/Physics/Meshing/PrimMesher.cs
index c397290195..ca16b63aac 100644
--- a/OpenSim/Region/Physics/Meshing/PrimMesher.cs
+++ b/OpenSim/Region/Physics/Meshing/PrimMesher.cs
@@ -1232,8 +1232,8 @@ namespace PrimMesher
                 this.profileEnd = 0.02f;
             if (profileStart >= profileEnd)
                 this.profileStart = profileEnd - 0.02f;
-            if (hollow > 1.0f)
-                this.hollow = 1.0f;
+            if (hollow > 0.99f)
+                this.hollow = 0.99f;
             if (hollow < 0.0f)
                 this.hollow = 0.0f;