diff --git a/code/PostProcessing/SortByPTypeProcess.cpp b/code/PostProcessing/SortByPTypeProcess.cpp
index 48ebbc573..3de1818ff 100644
--- a/code/PostProcessing/SortByPTypeProcess.cpp
+++ b/code/PostProcessing/SortByPTypeProcess.cpp
@@ -167,6 +167,10 @@ void SortByPTypeProcess::Execute(aiScene *pScene) {
         // with the largest number of primitives
         unsigned int aiNumPerPType[4] = { 0, 0, 0, 0 };
         aiFace *pFirstFace = mesh->mFaces;
+        if (!pFirstFace) {
+            continue;
+        }
+
         aiFace *const pLastFace = pFirstFace + mesh->mNumFaces;
 
         unsigned int numPolyVerts = 0;