diff --git a/hostmap.go b/hostmap.go
index b718ee5..6dc0fec 100644
--- a/hostmap.go
+++ b/hostmap.go
@@ -476,7 +476,7 @@ func (i *HostInfo) TryPromoteBest(preferredRanges []*net.IPNet, ifce *Interface)
 		return
 	}
 
-	if atomic.AddUint32(&i.promoteCounter, 1)&PromoteEvery == 0 {
+	if atomic.AddUint32(&i.promoteCounter, 1)%PromoteEvery == 0 {
 		// return early if we are already on a preferred remote
 		rIP := i.remote.IP
 		for _, l := range preferredRanges {