diff --git a/include/spdk/thread.h b/include/spdk/thread.h
index 35b5578fd..a6f3cb5ae 100644
--- a/include/spdk/thread.h
+++ b/include/spdk/thread.h
@@ -328,7 +328,6 @@ const char *spdk_thread_get_name(const struct spdk_thread *thread);
 struct spdk_thread_stats {
 	uint64_t busy_tsc;
 	uint64_t idle_tsc;
-	uint64_t unknown_tsc;
 };
 
 /**
diff --git a/lib/thread/thread.c b/lib/thread/thread.c
index 5e0623a45..6f16c1ca4 100644
--- a/lib/thread/thread.c
+++ b/lib/thread/thread.c
@@ -532,9 +532,6 @@ spdk_thread_poll(struct spdk_thread *thread, uint32_t max_msgs, uint64_t now)
 	} else if (rc > 0) {
 		/* Poller status busy */
 		thread->stats.busy_tsc += now - thread->tsc_last;
-	} else {
-		/* Poller status unknown */
-		thread->stats.unknown_tsc += now - thread->tsc_last;
 	}
 	thread->tsc_last = now;