diff --git a/extra/ogg/player/player.factor b/extra/ogg/player/player.factor
old mode 100644
new mode 100755
index 518030ee4d..dae96dc0ea
--- a/extra/ogg/player/player.factor
+++ b/extra/ogg/player/player.factor
@@ -149,7 +149,7 @@ HINTS: yuv>rgb byte-array byte-array ;
     dup player-gadget [
         dup { player-td player-yuv } get-slots theora_decode_YUVout drop
         dup player-rgb over player-yuv yuv>rgb
-        dup player-gadget find-world dup draw-world
+        dup player-gadget find-world draw-world
     ] when ;
 
 : num-audio-buffers-processed ( player -- player n )
diff --git a/extra/space-invaders/space-invaders.factor b/extra/space-invaders/space-invaders.factor
index d992df4d8f..d66ffdc66e 100755
--- a/extra/space-invaders/space-invaders.factor
+++ b/extra/space-invaders/space-invaders.factor
@@ -3,8 +3,9 @@
 !
 USING: cpu.8080 cpu.8080.emulator openal math alien.c-types
 sequences kernel shuffle arrays io.files combinators ui.gestures
-ui.gadgets ui.render opengl.gl system threads match
-ui byte-arrays combinators.lib ;
+ui.gadgets ui.render opengl.gl system match
+ui byte-arrays combinators.lib qualified ;
+QUALIFIED: threads
 IN: space-invaders
 
 TUPLE: space-invaders port1 port2i port2o port3o port4lo port4hi port5o bitmap sounds looping? ;
@@ -337,7 +338,7 @@ M: space-invaders update-video ( value addr cpu -- )
 : sync-frame ( millis -- millis )
   #! Sleep until the time for the next frame arrives.
   1000 60 / >fixnum + millis - dup 0 >
-  [ sleep ] [ drop yield ] if millis ;
+  [ threads:sleep ] [ drop threads:yield ] if millis ;
 
 : invaders-process ( millis gadget -- )
   #! Run a space invaders gadget inside a 
@@ -356,7 +357,7 @@ M: invaders-gadget graft* ( gadget -- )
   dup invaders-gadget-cpu init-sounds
   f over set-invaders-gadget-quit?
   [ millis swap invaders-process ] curry
-  "Space invaders" spawn drop ;
+  "Space invaders" threads:spawn drop ;
 
 M: invaders-gadget ungraft* ( gadget -- )
  t swap set-invaders-gadget-quit? ;