diff --git a/src/common/kernel/region.c b/src/common/kernel/region.c
index 795259b96..118ad4ac2 100644
--- a/src/common/kernel/region.c
+++ b/src/common/kernel/region.c
@@ -948,6 +948,7 @@ free_region(region * r)
 void
 free_regions(void)
 {
+  memset(uidhash, 0, sizeof(uidhash));
   while (deleted_regions) {
     region * r = deleted_regions;
     deleted_regions = r->next;