X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/99b16dee903054c03f5949ee674b0344cbccf1cd..66f29e001c608bf8ca3ed25f492fbd88e23e1b5e:/netdissect-stdinc.h

diff --git a/netdissect-stdinc.h b/netdissect-stdinc.h
index a0c3fc21..b214be5f 100644
--- a/netdissect-stdinc.h
+++ b/netdissect-stdinc.h
@@ -220,7 +220,7 @@
 #define inline __inline
 #endif
 
-#ifdef AF_INET6
+#if defined(AF_INET6) && !defined(HAVE_OS_IPV6_SUPPORT)
 #define HAVE_OS_IPV6_SUPPORT
 #endif