diff --git a/src/peers.c b/src/peers.c
index 0564d3d..92b4df0 100644
--- a/src/peers.c
+++ b/src/peers.c
@@ -720,7 +720,7 @@
 							ts = stktable_store(ps->table->table, newts, 0);
 							newts = NULL; /* don't reuse it */
 
-							ts->upd.key= (++ps->table->table->update)+(2^31);
+							ts->upd.key= (++ps->table->table->update)+(2147483648U);
 							eb = eb32_insert(&ps->table->table->updates, &ts->upd);
 							if (eb != &ts->upd) {
 								eb32_delete(eb);