Index: apps/app_addon_sql_mysql.c
===================================================================
--- apps/app_addon_sql_mysql.c	(revision 902)
+++ apps/app_addon_sql_mysql.c	(working copy)
@@ -392,7 +392,7 @@
 						break;
 					}
 					s6 = mysqlrow[j];
-					pbx_builtin_setvar_helper(chan, s5, s6 ? s6 : "NULL");
+					pbx_builtin_setvar_helper(chan, s5, s6);
 				}
 				ast_debug(5, "ast_MYSQL_fetch: numFields=%d\n", numFields);
 				set_asterisk_int(chan, args.resultvar, 1); // try more rows