diff --git a/internal/dhcp4d/dhcp4d.go b/internal/dhcp4d/dhcp4d.go
index 3b39830..83bb449 100644
--- a/internal/dhcp4d/dhcp4d.go
+++ b/internal/dhcp4d/dhcp4d.go
@@ -219,15 +219,18 @@ func (h *Handler) serveDHCP(p dhcp4.Packet, msgType dhcp4.MessageType, options d
 		// try to offer the requested IP, if any and available
 		if !bytes.Equal(reqIP.To4(), net.IPv4zero) {
 			free = h.canLease(reqIP, hwAddr)
+			//log.Printf("canLease(%v, %s) = %d", reqIP, hwAddr, free)
 		}
 
 		// offer previous lease for this HardwareAddr, if any
 		if lease, ok := h.leasesHW[hwAddr]; ok && !lease.Expired(h.timeNow()) {
 			free = lease.Num
+			//log.Printf("h.leasesHW[%s] = %d", hwAddr, free)
 		}
 
 		if free == -1 {
 			free = h.findLease()
+			//log.Printf("findLease = %d", free)
 		}
 
 		if free == -1 {