diff --git a/support/functions/_cmd_build b/support/functions/_cmd_build
index af119c9..1c90825 100644
--- a/support/functions/_cmd_build
+++ b/support/functions/_cmd_build
@@ -126,7 +126,7 @@ _cmd_build(){
 	done
 
 #change default oscam CONF_DIR
-if [ "$CUSTOM_CONFDIR" == "not_set" ];
+if [ "$CUSTOM_CONFDIR" == "not_set" ] && [ ${#_oscamconfdir_custom} -lt 4 ];
 then
     CONFDIR="$_oscamconfdir_default"
     cdtag="CONF_DIR=$CONFDIR"