diff --git a/src/wdt.c b/src/wdt.c
index 9f5b81729..865bb7b25 100644
--- a/src/wdt.c
+++ b/src/wdt.c
@@ -83,7 +83,7 @@ void wdt_handler(int sig, siginfo_t *si, void *arg)
 		if (!p || n - p < 1000000000UL)
 			goto update_and_leave;
 
-		if ((_HA_ATOMIC_LOAD(&th_ctx->flags) & TH_FL_SLEEPING) &&
+		if ((_HA_ATOMIC_LOAD(&ha_thread_ctx[thr].flags) & TH_FL_SLEEPING) ||
 		    (_HA_ATOMIC_LOAD(&ha_tgroup_ctx[tgrp-1].threads_harmless) & thr_bit)) {
 			/* This thread is currently doing exactly nothing
 			 * waiting in the poll loop (unlikely but possible),