diff --git a/src/core/iomgr/resolve_address.c b/src/core/iomgr/resolve_address.c
index 6d748c86981..ce9b157e31a 100644
--- a/src/core/iomgr/resolve_address.c
+++ b/src/core/iomgr/resolve_address.c
@@ -134,7 +134,7 @@ grpc_resolved_addresses *grpc_blocking_resolve_address(
     un = (struct sockaddr_un *)addrs->addrs->addr;
     un->sun_family = AF_UNIX;
     strcpy(un->sun_path, name + 5);
-    addrs->addrs->len = strlen(un->sun_path) + sizeof(un->sun_family);
+    addrs->addrs->len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
     return addrs;
   }