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-rw-r--r--avahi-common/address.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/avahi-common/address.h b/avahi-common/address.h
index 58e6414..7f10a55 100644
--- a/avahi-common/address.h
+++ b/avahi-common/address.h
@@ -53,7 +53,7 @@ enum {
#define AVAHI_ADDRESS_STR_MAX 40 /* IPv6 Max = 4*8 + 7 + 1 for NUL */
/** Return TRUE if the specified interface index is valid */
-#define AVAHI_IF_VALID(ifindex) (((ifindex) >= 0) || ((ifindex) == AVAHI_PROTO_UNSPEC))
+#define AVAHI_IF_VALID(ifindex) (((ifindex) > 0) || ((ifindex) == AVAHI_PROTO_UNSPEC))
/** Return TRUE if the specified protocol is valid */
#define AVAHI_PROTO_VALID(protocol) (((protocol) == AVAHI_PROTO_INET) || ((protocol) == AVAHI_PROTO_INET6) || ((protocol) == AVAHI_PROTO_UNSPEC))