diff --git a/src/Sprite2.s b/src/Sprite2.s
index bc24434..d622bfb 100644
--- a/src/Sprite2.s
+++ b/src/Sprite2.s
@@ -129,7 +129,7 @@ _CalcDirtySprite
         adc   StartYMod208
         bpl   :y_ok
         clc
-        adc   #208                               ; Wrap the actual coordinat around
+        adc   #208                               ; Wrap the actual coordinate around
 :y_ok   and   #$FFF8                             ; mask first to ensure LSR will clear the carry
         lsr
         lsr
diff --git a/src/tiles/DirtyTileQueue.s b/src/tiles/DirtyTileQueue.s
index 459c00e..bd16e1b 100644
--- a/src/tiles/DirtyTileQueue.s
+++ b/src/tiles/DirtyTileQueue.s
@@ -70,8 +70,7 @@ _PopDirtyTile2                                       ; alternate entry point
                  sty  DirtyTileCount                 ; remove last item from the list
 
                  ldx  DirtyTiles,y                   ; load the offset into the Tile Store
-                 lda  #$FFFF
-                 stal TileStore+TS_DIRTY,x           ; clear the occupied backlink
+                 stz  TileStore+TS_DIRTY,x           ; clear the occupied backlink
                  rts
 
 ; An optimized subroutine that runs through the dirty tile list and executes a callback function