diff --git a/firmware/loadable/spaceinvaders.c b/firmware/loadable/spaceinvaders.c
index c531eca..0aa5e27 100644
--- a/firmware/loadable/spaceinvaders.c
+++ b/firmware/loadable/spaceinvaders.c
@@ -17,7 +17,7 @@ void delayms(uint32_t ms);
 #define ENEMY_COLUMNS 6
 #define DISABLED 255
 
-#define UFO_PROB 1000
+#define UFO_PROB 1024
 
 #define TYPE_PLAYER 1
 #define TYPE_ENEMY_A 2