1 files changed, 2 insertions, 0 deletions

diff --git a/plugins/utils.h.in b/plugins/utils.h.in
index 0d947f42..89ada6f0 100644
--- a/plugins/utils.h.in
+++ b/plugins/utils.h.in
@@ -30,7 +30,9 @@ int timeout_interval = DEFAULT_SOCKET_TIMEOUT;
 int is_host (char *);
 int is_addr (char *);
 int is_inet_addr (char *);
+#ifdef USE_IPV6
 int is_inet6_addr (char *);
+#endif
 int is_hostname (char *);
 
 int is_integer (char *);