diff --git a/meta/packages/pong-clock/pong-clock_1.0.bb b/meta/packages/pong-clock/pong-clock_1.0.bb
index 3bbab7d8bb..571a90dbd3 100644
--- a/meta/packages/pong-clock/pong-clock_1.0.bb
+++ b/meta/packages/pong-clock/pong-clock_1.0.bb
@@ -1,5 +1,6 @@
 DESCRIPTION = "A clock combined with a game of pong"
 LICENCE = "GPLv2"
+DEPENDS = "virtual/libx11 xdmcp xau"
 
 SRC_URI = "file://pong-clock-no-flicker.c"