diff --git a/src/libnm-glib-aux/nm-time-utils.h b/src/libnm-glib-aux/nm-time-utils.h
index 05da3fd2b6..b2bb72bfca 100644
--- a/src/libnm-glib-aux/nm-time-utils.h
+++ b/src/libnm-glib-aux/nm-time-utils.h
@@ -56,6 +56,12 @@ nm_utils_get_monotonic_timestamp_nsec_cached(gint64 *cache_now)
     return (*cache_now) ?: (*cache_now = nm_utils_get_monotonic_timestamp_nsec());
 }
 
+static inline gint64
+nm_utils_get_monotonic_timestamp_usec_cached(gint64 *cache_now)
+{
+    return (*cache_now) ?: (*cache_now = nm_utils_get_monotonic_timestamp_usec());
+}
+
 static inline gint64
 nm_utils_get_monotonic_timestamp_msec_cached(gint64 *cache_now)
 {