diff --git a/src/validate.c b/src/validate.c
index 62406ab..daa0fcd 100644
--- a/src/validate.c
+++ b/src/validate.c
@@ -362,6 +362,7 @@ static DesktopKeyDefinition registered_desktop_keys[] = {
   { DESKTOP_BOOLEAN_TYPE,           "X-KDE-RunOnDiscreteGpu", FALSE, TRUE, FALSE, NULL },
 
   /* Keys from other specifications */
+  { DESKTOP_STRING_LIST_TYPE,       "DesktopNames",      FALSE, FALSE, FALSE, NULL },
 
   /* Autostart spec, currently proposed; adopted by GNOME */
   { DESKTOP_STRING_TYPE,            "AutostartCondition", FALSE, FALSE, FALSE, handle_autostart_condition_key }