diff --git a/tecs/tecs.c b/tecs/tecs.c
index b39c6de..5cdfc49 100644
--- a/tecs/tecs.c
+++ b/tecs/tecs.c
@@ -1833,7 +1833,9 @@ int ConfigByCode(int plugNr) {
   FILE *fil;
   
   plug=plugs[plugNr];
-  str_copy(plug->device,"");
+  if (autoconfig) {
+    str_copy(plug->device,"");
+  }
   plug->devcmd=0;
   ConcatDevice();
   if (plug->code==0) {