diff --git a/bun.c b/bun.c
index 52b05e6..9d69eb7 100644
--- a/bun.c
+++ b/bun.c
@@ -191,7 +191,7 @@ void bun_anywhere(
   uint8_t plane;
   uint8_t shift = x & 15;
   uint8_t needsExtraWord = shift != 0;
-  uint16_t bltcon0, bltcon1, bltalwm, bltbmod, bltdmod, bltsize;
+  uint16_t bltcon0, bltcon1, bltalwm, bltamod, bltdmod, bltsize;
 
   bunClear->memoryStartOffsetBytes = WORD_ALIGNED_BYTE_POSITION(screenSetup->width, x, y);
 
@@ -200,7 +200,7 @@ void bun_anywhere(
   bunClear->direction = BLITTER_ASCENDING;
 
   // buns will never interfere with a background so they don't need a mask
-  bltcon0 = BLTCON0(0xc0, 0, 1, 0, 1, shift);
+  bltcon0 = BLTCON0(0xf0, 1, 0, 0, 1, shift);
   bltcon1 = BLTCON1(bunClear->direction, shift);
 
   if (needsExtraWord) {
@@ -209,7 +209,7 @@ void bun_anywhere(
     bltalwm = 0xffff;
   }
 
-  bltbmod = -(needsExtraWord * 2);
+  bltamod = -(needsExtraWord * 2);
   bltdmod = screenSetup->byteWidth - COOL_BUN_WIDTH_BYTES - (needsExtraWord * 2);
   bltsize = bunClear->widthWords + (bunClear->heightRows << 6);
 
@@ -217,8 +217,7 @@ void bun_anywhere(
     custom.bltcon0 = bltcon0;
     custom.bltcon1 = bltcon1;
 
-    custom.bltadat = 0xffff;
-    custom.bltbpt = coolbunPlaneStarts[BUN_ANYWHERE][plane];
+    custom.bltapt = coolbunPlaneStarts[BUN_ANYWHERE][plane];
     custom.bltdpt = currentScreen->planes[plane] +
       bunClear->memoryStartOffsetBytes;
 
@@ -226,7 +225,7 @@ void bun_anywhere(
     custom.bltafwm = 0xffff;
     custom.bltalwm = bltalwm;
 
-    custom.bltbmod = bltbmod;
+    custom.bltamod = bltamod;
     custom.bltdmod = bltdmod;
     custom.bltsize = bltsize;