diff --git a/src/ve/velib03a.cpp b/src/ve/velib03a.cpp
index 317a3efa5..a4a68c07d 100755
--- a/src/ve/velib03a.cpp
+++ b/src/ve/velib03a.cpp
@@ -616,6 +616,8 @@ int TExpr_documento::parse_user_func(const char * name, int nparms) const
     return nparms == 0 ? _nrate : -1;
 	if (strcmp(name, "QTACONAI") == 0)
 		return nparms >= 1 && nparms < 4 ? _qtaconai : -1;
+	if (strcmp(name, "PESOCONAI") == 0)
+		return nparms >= 1 && nparms < 4 ? _pesoconai : -1;
 	if (strcmp(name, "VALCONAI") == 0)
 		return nparms >= 1 && nparms < 4 ? _valconai : -1;
 	return -1;
@@ -1066,6 +1068,7 @@ void TExpr_documento::evaluate_user_func(int index, int nparms, TEval_stack & st
     default:
       TExpression::evaluate_user_func(index, nparms, stack, type);
       break;
+		case _pesoconai:
 		case _qtaconai:
 		{
 			const int ndec = (nparms > 2) ? (int)stack.pop_real().integer() : 5;
@@ -1086,13 +1089,12 @@ void TExpr_documento::evaluate_user_func(int index, int nparms, TEval_stack & st
 					{
 						const real peso = _row->get_real(conai_peso_name(i));
 
-						val += (peso * _row->get_real(RDOC_QTA));
+						val += (((index == _qtaconai) ? _row->get_real(RDOC_QTA) : UNO) * peso);
 					}
 				}
 				if (tipo_calcolo < 2 && cat.full())
 				{
 					real perc_esenz;
-
 					const TDate datadoc = _doc->get(DOC_DATADOC);
 					const TRectype& cfven = _doc->clifor().vendite();
 					const TDate dataies = cfven.get(CFV_DATAICONAI);