diff --git a/pimd/pim_igmp.c b/pimd/pim_igmp.c
index 069c515971..477cf991b4 100644
--- a/pimd/pim_igmp.c
+++ b/pimd/pim_igmp.c
@@ -494,6 +494,17 @@ bool pim_igmp_verify_header(struct ip *ip_hdr, size_t len, int igmp_msg_len,
 		}
 	}
 
+	if ((msg_type == PIM_IGMP_V3_MEMBERSHIP_REPORT)
+	    || ((msg_type == PIM_IGMP_MEMBERSHIP_QUERY)
+		&& (igmp_msg_len >= IGMP_V3_SOURCES_OFFSET))) {
+		/* All IGMPv3 messages must be received with TOS set to 0xC0*/
+		if (ip_hdr->ip_tos != IPTOS_PREC_INTERNETCONTROL) {
+			zlog_warn("Received IGMP Packet with invalid TOS %u",
+				  ip_hdr->ip_tos);
+			return -1;
+		}
+	}
+
 	return true;
 }