diff --git a/sys/net80211/ieee80211_dfs.c b/sys/net80211/ieee80211_dfs.c
index eec819bb8d3b..e15445d6a5ff 100644
--- a/sys/net80211/ieee80211_dfs.c
+++ b/sys/net80211/ieee80211_dfs.c
@@ -235,7 +235,7 @@ dfs_timeout(void *arg)
 	}
 	if (oldest != now) {
 		/* arrange to process next channel up for a status change */
-		callout_schedule(&dfs->nol_timer, oldest + NOL_TIMEOUT);
+		callout_schedule(&dfs->nol_timer, oldest + NOL_TIMEOUT - now);
 	}
 }