diff --git a/Platform/Apple/virtual/src/plasma/diskops.pla b/Platform/Apple/virtual/src/plasma/diskops.pla
index 41b18d62..485f4a00 100644
--- a/Platform/Apple/virtual/src/plasma/diskops.pla
+++ b/Platform/Apple/virtual/src/plasma/diskops.pla
@@ -113,7 +113,7 @@ asm copyHeap   // params: dir (0=AuxtoMain, 1=MainToAux)
         ldy #0
         sty tmp
         sty pTmp
-        ldx #$10
+        ldx #8    ; FIXME to #$10
 -       lda (tmp),y
         sta (pTmp),y
         iny