diff --git a/source/libublsettingsui-gtk3.h b/source/libublsettingsui-gtk3.h
index ff83b0e..7d675e6 100644
--- a/source/libublsettingsui-gtk3.h
+++ b/source/libublsettingsui-gtk3.h
@@ -319,7 +319,7 @@ char *yon_custom_config_init();
     #define ROOT_WARNING_LABEL _("Warning! Application was launched without root - root-dependent actions are locked")
 
     #define DEFAULT_LABEL _("Default")
-    #define DEFAULT_CUSTOM_LABEL(target) yon_char_unite(_("Default")," (",target,")",NULL)
+    #define DEFAULT_CUSTOM_LABEL(target) yon_char_unite(_("Default"),!yon_char_is_empty(target)?" (":NULL,target,")",NULL)
     #define ABOUT_LABEL _("About")
     #define DOCUMENTATION_LABEL _("Documentation")