diff --git a/starfield/main.asm b/starfield/main.asm
index b320e7d..45bd48d 100644
--- a/starfield/main.asm
+++ b/starfield/main.asm
@@ -175,28 +175,6 @@ get_screen_address
     ret
 ENDP
 
-PROC
-;Input:
-; DE = Current screen address
-;
-;Output:
-; DE = (Y + 1) screen address
-;
-increment_y
-    inc d
-    ld a,d
-    and 7
-    ret nz
-    ld a,e
-    add a,32
-    ld e,a
-    ret c
-    ld a,d
-    sub 8
-    ld d,a
-    ret
-ENDP
-
 PROC
 INCLUDE "clear.asm"
 ENDP