diff --git a/src/process/fork.c b/src/process/fork.c
index 11286ef4..fb42478a 100644
--- a/src/process/fork.c
+++ b/src/process/fork.c
@@ -28,6 +28,7 @@ pid_t fork(void)
 		self->robust_list.off = 0;
 		self->robust_list.pending = 0;
 		self->next = self->prev = self;
+		__thread_list_lock = 0;
 		libc.threads_minus_1 = 0;
 	}
 	__restore_sigs(&set);