diff --git a/src/mesh.cpp b/src/mesh.cpp
index c8ab54a..3ec5282 100644
--- a/src/mesh.cpp
+++ b/src/mesh.cpp
@@ -92,8 +92,8 @@ unsigned int Mesh::updateFlags()
     }
     else
         m_flags |= 1 << MESH_2D;
-    
-    return m_flags | material->getFlags();
+
+    return m_flags | (material ? material->getFlags() : 0);
 }
 
 void Mesh::initGL()