diff --git a/include/relapp.cpp b/include/relapp.cpp
index 5deb029e0..c9d338967 100755
--- a/include/relapp.cpp
+++ b/include/relapp.cpp
@@ -946,8 +946,9 @@ bool TRelation_application::filter()
       {                                       
         TString16 field_name(field->name()); 
         const int from = field->from();
+        const int to = field->to();
         
-        if (from >= 0)
+        if (to >= 0)
           field_name << "[" << (from + 1);
         const TString * v = (const TString *) field_values.objptr(field_name);