diff --git a/configure.ac b/configure.ac
index c405010d2b7edc02ba35163a2e016828db297e05..1341e561e98ef6f32f129862e159a2758abf56c4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1603,6 +1603,15 @@ AC_CHECK_DECL(basename, ,
 #endif
 )
 
+AC_CHECK_DECL(inet_pton, ,
+   AC_DEFINE(HAVE_NO_INET_PTON_PROTO),
+[
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+]
+)
+
 AC_MSG_CHECKING([if we are Mac OS X (to disable poll)])
 disable_poll=no
 case $host in
diff --git a/lib/inet_pton.h b/lib/inet_pton.h
index 8331ba9dc1b671ea432f3eb813458b14e2fc39b9..a659a97744cb58f063d37140bfb5405679f663a8 100644
--- a/lib/inet_pton.h
+++ b/lib/inet_pton.h
@@ -28,6 +28,11 @@
 int Curl_inet_pton(int, const char *, void *);
 
 #ifdef HAVE_INET_PTON
+
+#if defined(HAVE_NO_INET_PTON_PROTO)
+int inet_pton(int af, const char *src, void *dst);
+#endif
+
 #ifdef HAVE_ARPA_INET_H
 #include <arpa/inet.h>
 #endif