diff --git a/include/maskfld.cpp b/include/maskfld.cpp
index 06349817f..c1122bba5 100755
--- a/include/maskfld.cpp
+++ b/include/maskfld.cpp
@@ -128,6 +128,7 @@ void TMask_field::TControl_data::reset()
   _bmp_up = _bmp_dn = 0;
   _prompt.cut(0);
   _flags.cut(0);
+  _park.spaces(256);
   _park.cut(0);
 }