diff --git a/vmem.68k b/vmem.68k
index 056f2e3..a4c541e 100644
--- a/vmem.68k
+++ b/vmem.68k
@@ -387,11 +387,11 @@ vmem_map_free_to:
 ; Copies the range of page mappings at address a0 in the primary space with length d0 to the secondary space starting at address a1
   public vmem_copy_to_secondary
 vmem_copy_to_secondary:
-  move.l d0, -(a7)
+  movem.l d0/a1, -(a7)
   ; Get the mapping pointer for the start page in the primary address space
   move.l #0, d0
   bsr.w vmem_get_map_ptr
-  move.l (a7)+, d0
+  movem.l (a7)+, d0/a1
   subi.l #1, d0 ; Subtract 1 to account for the extra loop done by dbra
 vmem_cts_loop:
   ; Read the next page mapping and increment the pointer