diff --git a/net/igmpproxy/files/patch-src_igmp.c b/net/igmpproxy/files/patch-src_igmp.c
new file mode 100644
index 000000000000..07ec003f8c30
--- /dev/null
+++ b/net/igmpproxy/files/patch-src_igmp.c
@@ -0,0 +1,11 @@
+--- src/igmp.c.orig	2022-10-29 10:01:46 UTC
++++ src/igmp.c
+@@ -288,7 +288,7 @@ static void buildIgmp(uint32_t src, uint32_t dst, int 
+     igmp->igmp_group.s_addr = group;
+     igmp->igmp_cksum        = 0;
+     igmp->igmp_cksum        = inetChksum((unsigned short *)igmp,
+-                                         IP_HEADER_RAOPT_LEN + datalen);
++                                         sizeof(igmp) + datalen);
+ 
+ }
+