diff --git a/configure.ac b/configure.ac
index 5b1400fb0e17622325bb23aa6a8df0abe32c9ccd..aa107a91bdcbf2bff3228660e00d699bf5452511 100644
--- a/configure.ac
+++ b/configure.ac
@@ -900,6 +900,7 @@ AC_CHECK_FUNCS( socket \
                 gettimeofday \
                 inet_addr \
                 inet_ntoa \
+                inet_pton \
                 tcsetattr \
                 tcgetattr \
                 perror \