diff --git a/lib/get_cdr_export_fields b/lib/get_cdr_export_fields
index 7fb7f9d7..c14ff668 100644
--- a/lib/get_cdr_export_fields
+++ b/lib/get_cdr_export_fields
@@ -202,7 +202,7 @@ END;
 
 out.joins = [];
 FOREACH X_f IN argv.export_joins;
-  IF X_f.alias.length > 0;
+  IF X_f.alias && X_f.alias.length > 0;
     X_table_spec = X_f.table _ ' ' _ X_f.alias;
   ELSE;
     X_table_spec = X_f.table;
@@ -226,4 +226,4 @@ FOREACH X_f IN argv.export_conditions;
   out.conditions.push("{ '" _ X_condition_column _ "' => { '" _ X_f.operand _ "' => '" _ X_f.compare_value _ "' } }");
 END;
 
--%]
\ No newline at end of file
+-%]