diff --git a/shared/nm-glib-aux/nm-time-utils.h b/shared/nm-glib-aux/nm-time-utils.h
index 47715bf50a..190d949127 100644
--- a/shared/nm-glib-aux/nm-time-utils.h
+++ b/shared/nm-glib-aux/nm-time-utils.h
@@ -37,6 +37,13 @@ nm_utils_get_monotonic_timestamp_nsec_cached (gint64 *cache_now)
 	       ?: (*cache_now = nm_utils_get_monotonic_timestamp_nsec ());
 }
 
+static inline gint64
+nm_utils_get_monotonic_timestamp_msec_cached (gint64 *cache_now)
+{
+	return    (*cache_now)
+	       ?: (*cache_now = nm_utils_get_monotonic_timestamp_msec ());
+}
+
 gint64 nm_utils_clock_gettime_nsec (clockid_t clockid);
 gint64 nm_utils_clock_gettime_msec (clockid_t clockid);