--- /dev/null	2015-01-19 17:18:26.000000000 +0100
+++ freeradius-client-1.1.7/include/freeradius-client.h	2016-07-25 09:41:42.484878090 +0200
@@ -511,6 +511,7 @@
 void rc_destroy(rc_handle *);
 char *rc_fgetln(FILE *, size_t *);
 double rc_getctime(void);
+double rc_getmtime(void);
 
 /*	env.c			*/
 
--- /dev/null	2015-01-19 17:18:26.000000000 +0100
+++ freeradius-client-1.1.7/lib/buildreq.c	2016-07-25 09:46:28.452424496 +0200
@@ -98,7 +98,7 @@
 		 * Fill in Acct-Delay-Time
 		 */
 		dtime = 0;
-		now = rc_getctime();
+		now = rc_getmtime();
 		adt_vp = rc_avpair_get(data.send_pairs, PW_ACCT_DELAY_TIME, 0);
 		if (adt_vp == NULL) {
 			adt_vp = rc_avpair_add(rh, &(data.send_pairs),
@@ -114,7 +114,7 @@
 	skip_count = 0;
 	result = ERROR_RC;
 	for (i=0; (i < aaaserver->max) && (result != OK_RC) && (result != BADRESP_RC)
-	    ; i++, now = rc_getctime())
+	    ; i++, now = rc_getmtime())
 	{
 		if (aaaserver->deadtime_ends[i] != -1 &&
 		    aaaserver->deadtime_ends[i] > start_time) {
@@ -156,7 +156,7 @@
 		    aaaserver->port[i], aaaserver->secret[i], timeout, retries);
 
 		if (request_type == PW_ACCOUNTING_REQUEST) {
-			dtime = rc_getctime() - start_time;
+			dtime = rc_getmtime() - start_time;
 			rc_avpair_assign(adt_vp, &dtime, 0);
 		}
 
--- /dev/null	2015-01-19 17:18:26.000000000 +0100
+++ freeradius-client-1.1.7/lib/sendserver.c	2016-07-25 09:43:38.836694440 +0200
@@ -351,9 +351,9 @@
 		pfd.fd = sockfd;
 		pfd.events = POLLIN;
 		pfd.revents = 0;
-		start_time = rc_getctime();
+		start_time = rc_getmtime();
 		for (timeout = data->timeout; timeout > 0;
-		    timeout -= rc_getctime() - start_time) {
+		    timeout -= rc_getmtime() - start_time) {
 			result = poll(&pfd, 1, timeout * 1000);
 			if (result != -1 || errno != EINTR)
 				break;
--- /dev/null	2015-01-19 17:18:26.000000000 +0100
+++ freeradius-client-1.1.7/lib/util.c	2016-07-25 09:49:22.172145380 +0200
@@ -345,3 +345,22 @@
 
     return timev.tv_sec + ((double)timev.tv_usec) / 1000000.0;
 }
+
+/*
+ * Function: rc_getmtime
+ *
+ * Purpose: Get monotonic time (seconds since some fixed start) expressed as
+ * double-precision floating point number.
+ *
+ */
+
+double
+rc_getmtime(void)
+{
+    struct timespec timespec = {0};
+
+    if (clock_gettime(CLOCK_MONOTONIC, &timespec) != 0)
+        return -1;
+
+    return timespec.tv_sec + ((double)timespec.tv_nsec) / 1000000000.0d;
+}