diff --git a/src/SMDS/SMDSAbs_ElementType.hxx b/src/SMDS/SMDSAbs_ElementType.hxx
index fed89972f..996b4a903 100644
--- a/src/SMDS/SMDSAbs_ElementType.hxx
+++ b/src/SMDS/SMDSAbs_ElementType.hxx
@@ -38,4 +38,10 @@ enum SMDSAbs_ElementType
 	SMDSAbs_Volume
 };
 
+enum SMDSAbs_ElementOrder {
+  ORDER_ANY,          /*! entities of any order */
+  ORDER_LINEAR,       /*! entities of 1st order */
+  ORDER_QUADRATIC     /*! entities of 2nd order */
+};
+
 #endif