diff --git a/hw/vhost.c b/hw/vhost.c
index d37a66e..f30cf91 100644
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -119,7 +119,6 @@ static void vhost_dev_unassign_memory(struct vhost_dev *dev,
         if (start_addr <= reg->guest_phys_addr && memlast >= reglast) {
             --dev->mem->nregions;
             --to;
-            assert(to >= 0);
             ++overlap_middle;
             continue;
         }