diff --git a/src/cg/cg4303.cpp b/src/cg/cg4303.cpp
index 83a554e79..6c6fa369c 100755
--- a/src/cg/cg4303.cpp
+++ b/src/cg/cg4303.cpp
@@ -162,7 +162,7 @@ void TLiquidazione_app::recalc_ventilation(int month, const char* codatt)
 
       if (tipocr == 1 && (mese == m) && att == curr_att)  
       {
-        if (!civa.iva_da_ventilare())   
+        if (tipoiva != "NS" && tipoiva != "NI" && tipoiva != "ES")
         {
           real lurd     = _pim->get_real("R0");
           lurd         += _pim->get_real("R1");