diff --git a/tools/modelcompiler/src/modeleditor.cpp b/tools/modelcompiler/src/modeleditor.cpp
index 8f4d91e..4a0152a 100755
--- a/tools/modelcompiler/src/modeleditor.cpp
+++ b/tools/modelcompiler/src/modeleditor.cpp
@@ -174,7 +174,8 @@ void ModelEditor::compile_model() {
         aiProcess_ImproveCacheLocality |
         aiProcess_JoinIdenticalVertices |
         aiProcess_OptimizeMeshes |
-        aiProcess_CalcTangentSpace;
+        aiProcess_CalcTangentSpace |
+        aiProcess_GenNormals;
 
     if(flags.compile_static) {
         importer.SetPropertyFloat(AI_CONFIG_GLOBAL_SCALE_FACTOR_KEY, 1.0);