diff --git a/src/scan.c b/src/scan.c
index fa3ec2a..c4aabe7 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -26,12 +26,12 @@ static void dispatch_callback(u_char *user, const struct pcap_pkthdr *h,
 	                     sizeof(struct tcphdr)) {
 		tcp_response(packet, data);
 	}
-	if (iphdr->protocol == IPPROTO_UDP &&
+	else if (iphdr->protocol == IPPROTO_UDP &&
 	    h->caplen >= sizeof(struct ether_header) + sizeof(struct iphdr) +
 	                     sizeof(struct udphdr)) {
 		udp_response(packet, data);
 	}
-	if (iphdr->protocol == IPPROTO_ICMP &&
+	else if (iphdr->protocol == IPPROTO_ICMP &&
 	    h->caplen >= sizeof(struct ether_header) + sizeof(struct iphdr) +
 	                     sizeof(struct icmphdr)) {
 		icmp_response(packet, data);