diff --git a/src/modules/module-portal.c b/src/modules/module-portal.c
index e7f648a84..fdbe705c5 100644
--- a/src/modules/module-portal.c
+++ b/src/modules/module-portal.c
@@ -173,7 +173,7 @@ static void update_portal_pid(struct impl *impl)
 	impl->portal_pid = 0;
 
 	m = dbus_message_new_method_call("org.freedesktop.DBus",
-					 "/",
+					 "/org/freedesktop/DBus",
 					 "org.freedesktop.DBus",
 					 "GetConnectionUnixProcessID");