diff --git a/configure.ac b/configure.ac
index f378279..4bbccae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -200,7 +200,7 @@ if test "x$ac_cv_have___va_copy" = "xyes" ; then
 	AC_DEFINE([HAVE___VA_COPY], [1], [Define if __va_copy exists])
 fi
 
-AC_CHECK_HEADERS([err.h md5.h sha2.h])
+AC_CHECK_HEADERS([sys/sysctl.h err.h md5.h sha2.h])
 AC_CHECK_HEADERS([sys/sensors.h],
 	AM_CONDITIONAL(HAVE_SENSORS, true),
 	AM_CONDITIONAL(HAVE_SENSORS, false)