diff --git a/libsrc/meshing/curvedelems.cpp b/libsrc/meshing/curvedelems.cpp
index 41b3d91e..c257049c 100644
--- a/libsrc/meshing/curvedelems.cpp
+++ b/libsrc/meshing/curvedelems.cpp
@@ -1507,6 +1507,7 @@ namespace netgen
 
   bool CurvedElements :: IsSurfaceElementCurved (SurfaceElementIndex elnr) const
   {
+    if (mesh[elnr].GetType() != TRIG) return true;
     if (!IsHighOrder()) return false;
 
     if (mesh.coarsemesh)