diff --git a/include/maskfld.cpp b/include/maskfld.cpp
index e1388eb65..1f71202f4 100755
--- a/include/maskfld.cpp
+++ b/include/maskfld.cpp
@@ -3635,7 +3635,7 @@ void TList_field::create(WINDOW parent)
 
 int TList_field::str2curr(const char* data)
 {
-  TString16 str(data);
+  TString str(data);
 
   if (roman() && str.len() < 2)
     str.insert("0",0);