diff --git a/sandbox/vm/vm_zone.c b/sandbox/vm/vm_zone.c
index a116a83..13dbf86 100644
--- a/sandbox/vm/vm_zone.c
+++ b/sandbox/vm/vm_zone.c
@@ -78,7 +78,7 @@ void vm_zone_init(vm_zone_t *z, const char *name, uintptr_t base, uintptr_t limi
 			continue;
 		}
 
-		convert_region_to_blocks(z, block_start, i, this_page_reserved);
+		convert_region_to_blocks(z, block_start, i, last_page_reserved);
 
 		block_start = i;
 		last_page_reserved = this_page_reserved;