diff --git a/contrib/wpa/src/utils/os_unix.c b/contrib/wpa/src/utils/os_unix.c
--- a/contrib/wpa/src/utils/os_unix.c
+++ b/contrib/wpa/src/utils/os_unix.c
@@ -97,12 +97,12 @@
 			return 0;
 		}
 		switch (clock_id) {
-#ifdef CLOCK_BOOTTIME
+#if (defined(CLOCK_BOOTTIME) && defined(CLOCK_MONOTONIC)) && (CLOCK_MONOTONIC != CLOCK_BOOTTIME)
 		case CLOCK_BOOTTIME:
 			clock_id = CLOCK_MONOTONIC;
 			break;
 #endif
-#ifdef CLOCK_MONOTONIC
+#if defined(CLOCK_MONOTONIC) && (!defined(CLOCK_BOOTTIME) || CLOCK_MONOTONIC != CLOCK_BOOTTIME)
 		case CLOCK_MONOTONIC:
 			clock_id = CLOCK_REALTIME;
 			break;