diff --git a/cg/cg2102.cpp b/cg/cg2102.cpp
index 4ecef6e8f..304934736 100755
--- a/cg/cg2102.cpp
+++ b/cg/cg2102.cpp
@@ -708,6 +708,7 @@ bool TPrimanota_application::cg_notify(TSheet_field& cg, int r, KEY k)
 {                            
   static TImporto old_spesa;
   
+  CHECKD(r >= 0, "Chi e' quel ca$$one che notifica la riga ", r);
   TToken_string& row = cg.row(r);
   const char tipo = row_type(row);          // Tipo della riga in esame