diff --git a/code/PostProcessing/JoinVerticesProcess.cpp b/code/PostProcessing/JoinVerticesProcess.cpp
index 30831eed0..3bf96afeb 100644
--- a/code/PostProcessing/JoinVerticesProcess.cpp
+++ b/code/PostProcessing/JoinVerticesProcess.cpp
@@ -264,13 +264,12 @@ int JoinVerticesProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex) {
     // We should care only about used vertices, not all of them
     // (this can happen due to original file vertices buffer being used by
     // multiple meshes)
-    std::vector<unsigned int> usedVertexIndicesMask;
-    usedVertexIndicesMask.resize((pMesh->mNumVertices + 31) / 32, 0);
+    std::vector<bool> usedVertexIndicesMask;
+    usedVertexIndicesMask.resize(pMesh->mNumVertices, false);
     for (unsigned int a = 0; a < pMesh->mNumFaces; a++) {
         aiFace& face = pMesh->mFaces[a];
         for (unsigned int b = 0; b < face.mNumIndices; b++) {
-            const unsigned int currIndex = face.mIndices[b];
-            usedVertexIndicesMask[currIndex / 32] |= 1u << (currIndex % 32);
+            usedVertexIndicesMask[face.mIndices[b]] = true;
         }
     }
 
@@ -336,7 +335,7 @@ int JoinVerticesProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex) {
     int newIndex = 0;
     for( unsigned int a = 0; a < pMesh->mNumVertices; a++)  {
         // if the vertex is unused Do nothing
-        if (0 == (usedVertexIndicesMask[a / 32] & (1u << (a % 32)))) {
+        if (!usedVertexIndicesMask[a]) {
             continue;
         }
         // collect the vertex data