diff --git a/libc/bionic/pthread_setschedparam.cpp b/libc/bionic/pthread_setschedparam.cpp
index 10826d1..8a02728 100644
--- a/libc/bionic/pthread_setschedparam.cpp
+++ b/libc/bionic/pthread_setschedparam.cpp
@@ -31,11 +31,12 @@
 #include <sched.h>
 
 #include "private/ErrnoRestorer.h"
+#include "pthread_internal.h"
 
 int pthread_setschedparam(pthread_t t, int policy, const sched_param* param) {
   ErrnoRestorer errno_restorer;
 
-  pid_t tid = pthread_gettid_np(t);
+  pid_t tid = __pthread_internal_gettid(t, "pthread_setschedparam");
   if (tid == -1) return ESRCH;
 
   return (sched_setscheduler(tid, policy, param) == -1) ? errno : 0;
@@ -44,7 +45,7 @@
 int pthread_setschedprio(pthread_t t, int priority) {
   ErrnoRestorer errno_restorer;
 
-  pid_t tid = pthread_gettid_np(t);
+  pid_t tid = __pthread_internal_gettid(t, "pthread_setschedprio");
   if (tid == -1) return ESRCH;
 
   sched_param param = { .sched_priority = priority };