diff --git a/cg/cg4305.cpp b/cg/cg4305.cpp
index 9e0db2376..ef18ffaac 100755
--- a/cg/cg4305.cpp
+++ b/cg/cg4305.cpp
@@ -301,7 +301,7 @@ bool TLiquidazione_app::video_conferma(const real& newimp, const real& intr,
 // -------------------------------------------- calcolo acconto dicembre
 bool TLiquidazione_app::set_acconto(real& inf, real& ina)
 {
-  TMask m("cg4300c.msk");
+  TMask m("cg4300c");
   
   m.set(CHK_CGC_PRINT,"X");
   m.field(FLD_CGC_YEAR).set_handler(ch_year_handler);