diff --git a/cf/roken-frag.m4 b/cf/roken-frag.m4
index ae6d802d3..deab2d5ce 100644
--- a/cf/roken-frag.m4
+++ b/cf/roken-frag.m4
@@ -389,6 +389,16 @@ AC_PROTO_COMPAT([
 ],
 getservbyname, struct servent *getservbyname(const char *, const char *))
 
+AC_PROTO_COMPAT([
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+],
+getsockname, int getsockname(int, struct sockaddr*, socklen_t*))
+
 AC_PROTO_COMPAT([
 #ifdef HAVE_SYSLOG_H
 #include <syslog.h>