diff --git a/libc/bionic/pthread_key.cpp b/libc/bionic/pthread_key.cpp
index f2f4d20..6cc68af 100644
--- a/libc/bionic/pthread_key.cpp
+++ b/libc/bionic/pthread_key.cpp
@@ -218,7 +218,7 @@
     // startup trampoline (__pthread_start) hasn't been run yet by the
     // scheduler. t->tls will also be NULL after a thread's stack has been
     // unmapped but before the ongoing pthread_join() is finished.
-    if ((t->attr.flags & PTHREAD_ATTR_FLAG_ZOMBIE) || t->tls == NULL) {
+    if (t->tid == 0 || t->tls == NULL) {
       continue;
     }