diff --git a/configure.ag b/configure.ag
--- a/configure.ag
+++ b/configure.ag
@@ -2479,7 +2479,6 @@ AC_CHECK_HEADERS([crypt.h \
 	sys/param.h \
 	sys/resource.h \
 	sys/socket.h \
-	sys/sysctl.h \
 	sys/time.h \
 	sys/times.h \
 	sys/types.h \
@@ -2494,6 +2493,12 @@ AC_CHECK_HEADERS([crypt.h \
 	winsock.h \
 	xmmintrin.h \
 	])
+AC_CHECK_HEADERS([sys/sysctl.h], [], [],
+[$ac_includes_default
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+])
 
 SOCKET_LIBS=""
 have_setsockopt=no