diff --git a/configure b/configure
index 453c4e5..4498e0f 100755
--- a/configure
+++ b/configure
@@ -527,12 +527,12 @@ if [ $feat_ipv6 = "1" ] && \
     return !inet_ntop(AF_INET6, &n.sin6_addr.s6_addr, p, sizeof(p));'
 then
   add_def FEAT_IPV6
-  if test_code 'in6_pktinfo' 'sys/socket.h netinet/in.h' '' '' '
+  if test_code 'struct in6_pktinfo' 'sys/socket.h netinet/in.h' '' '' '
     return sizeof (struct in6_pktinfo) + IPV6_PKTINFO;'
   then
     add_def HAVE_IN6_PKTINFO
   else
-    if test_code 'in6_pktinfo with _GNU_SOURCE' 'sys/socket.h netinet/in.h' \
+    if test_code 'struct in6_pktinfo with _GNU_SOURCE' 'sys/socket.h netinet/in.h' \
       '-D_GNU_SOURCE' '' 'return sizeof (struct in6_pktinfo) + IPV6_PKTINFO;'
     then
       add_def _GNU_SOURCE