4 files changed, 16 insertions, 0 deletions

diff --git a/plugins/check_ping.c b/plugins/check_ping.c
index 0b2afce5..06bf8e76 100644
--- a/plugins/check_ping.c
+++ b/plugins/check_ping.c
@@ -227,7 +227,11 @@ process_arguments (int argc, char **argv)
                         address_family = AF_INET;
                         break;
                 case '6':       /* IPv6 only */
+#ifdef USE_IPV6
                         address_family = AF_INET6;
+#else
+                        usage ("IPv6 support not available\n");
+#endif
                         break;
                 case 'H':       /* hostname */
                         ptr=optarg;
diff --git a/plugins/check_ssh.c b/plugins/check_ssh.c
index 421fc01c..fba3a862 100644
--- a/plugins/check_ssh.c
+++ b/plugins/check_ssh.c
@@ -110,7 +110,11 @@ process_arguments (int argc, char **argv)
                         address_family = AF_INET;
                         break;
                 case '6':
+#ifdef USE_IPV6
                         address_family = AF_INET6;
+#else
+                        usage ("IPv6 support not available\n");
+#endif
                         break;
                 case 'H':                                                                       /* host */
                         if (is_host (optarg) == FALSE)
diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c
index b8af1a1d..ce4fd31f 100644
--- a/plugins/check_tcp.c
+++ b/plugins/check_tcp.c
@@ -449,7 +449,11 @@ process_arguments (int argc, char **argv)
                         address_family = AF_INET;
                         break;
                 case '6':
+#ifdef USE_IPV6
                         address_family = AF_INET6;
+#else
+                        usage ("IPv6 support not available\n");
+#endif
                         break;
                 case 'H':                 /* hostname */
                         if (is_host (optarg) == FALSE)
diff --git a/plugins/netutils.c b/plugins/netutils.c
index 60410c64..ea004bb4 100644
--- a/plugins/netutils.c
+++ b/plugins/netutils.c
@@ -326,7 +326,11 @@ is_host (char *address)
 int
 is_addr (char *address)
 {
+#ifdef USE_IPV6
         if (is_inet_addr (address) && address_family != AF_INET6)
+#else
+        if (is_inet_addr (address))
+#endif
                 return (TRUE);
 
 #ifdef USE_IPV6