diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 81a1df0fb5e2..1b53a2489ebb 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -4838,7 +4838,7 @@ void topology_probe()
 		siblings = get_thread_siblings(&cpus[i]);
 		if (siblings > max_siblings)
 			max_siblings = siblings;
-		if (cpus[i].thread_id != -1)
+		if (cpus[i].thread_id == 0)
 			topo.num_cores++;
 
 		if (debug > 1)