diff --git a/src/collision/TriangleVertexArray.cpp b/src/collision/TriangleVertexArray.cpp
index 56f3b422..7cfb2076 100644
--- a/src/collision/TriangleVertexArray.cpp
+++ b/src/collision/TriangleVertexArray.cpp
@@ -194,7 +194,7 @@ void TriangleVertexArray::getTriangleVerticesIndices(uint triangleIndex, uint* o
 
     assert(triangleIndex >= 0 && triangleIndex < mNbTriangles);
 
-    const uchar* triangleIndicesPointer = mIndicesStart + triangleIndex * 3 * mIndicesStride;
+    const uchar* triangleIndicesPointer = mIndicesStart + triangleIndex * mIndicesStride;
     const void* startTriangleIndices = static_cast<const void*>(triangleIndicesPointer);
 
     // For each vertex of the triangle
diff --git a/src/collision/TriangleVertexArray.h b/src/collision/TriangleVertexArray.h
index 3db79c7e..3a48c2e3 100644
--- a/src/collision/TriangleVertexArray.h
+++ b/src/collision/TriangleVertexArray.h
@@ -122,6 +122,12 @@ class TriangleVertexArray {
         /// Destructor
         ~TriangleVertexArray();
 
+        /// Deleted assignment operator
+        TriangleVertexArray& operator=(const TriangleVertexArray& triangleVertexArray) = delete;
+
+        /// Deleted copy-constructor
+        TriangleVertexArray(const TriangleVertexArray& triangleVertexArray) = delete;
+
         /// Return the vertex data type
         VertexDataType getVertexDataType() const;
 
@@ -141,7 +147,7 @@ class TriangleVertexArray {
         uint getVerticesStride() const;
 
         /// Return the vertex normals stride (number of bytes)
-        uint getVerticesNormlasStride() const;
+        uint getVerticesNormalsStride() const;
 
         /// Return the indices stride (number of bytes)
         uint getIndicesStride() const;
@@ -196,7 +202,7 @@ inline uint TriangleVertexArray::getVerticesStride() const {
 }
 
 // Return the vertex normals stride (number of bytes)
-inline uint TriangleVertexArray::getVerticesNormlasStride() const {
+inline uint TriangleVertexArray::getVerticesNormalsStride() const {
     return mVerticesNormalsStride;
 }