diff --git a/src/bin/debug/strace/events.cpp b/src/bin/debug/strace/events.cpp
index b9f25b7f48..0577154da2 100644
--- a/src/bin/debug/strace/events.cpp
+++ b/src/bin/debug/strace/events.cpp
@@ -390,4 +390,10 @@ patch_events()
 	Syscall *wait_for_child = get_syscall("_kern_wait_for_child");
 	wait_for_child->ParameterAt(2)->SetOut(true);
 	wait_for_child->ParameterAt(3)->SetOut(true);
+
+	Syscall *wait_for_thread = get_syscall("_kern_wait_for_thread");
+	wait_for_thread->ParameterAt(1)->SetOut(true);
+
+	Syscall *wait_for_thread_etc = get_syscall("_kern_wait_for_thread_etc");
+	wait_for_thread_etc->ParameterAt(3)->SetOut(true);
 }