diff --git a/Userland/Libraries/LibPthread/pthread.cpp b/Userland/Libraries/LibPthread/pthread.cpp
index 9fe543a3de..8c7943461e 100644
--- a/Userland/Libraries/LibPthread/pthread.cpp
+++ b/Userland/Libraries/LibPthread/pthread.cpp
@@ -656,4 +656,14 @@ int pthread_getname_np(pthread_t thread, char* buffer, size_t buffer_size)
     __RETURN_PTHREAD_ERROR(rc);
 }
 
+int pthread_setcancelstate([[maybe_unused]] int state, [[maybe_unused]] int* oldstate)
+{
+    TODO();
+}
+
+int pthread_setcanceltype([[maybe_unused]] int type, [[maybe_unused]] int* oldtype)
+{
+    TODO();
+}
+
 } // extern "C"
diff --git a/Userland/Libraries/LibPthread/pthread.h b/Userland/Libraries/LibPthread/pthread.h
index 617aac8a90..f00cdcbaed 100644
--- a/Userland/Libraries/LibPthread/pthread.h
+++ b/Userland/Libraries/LibPthread/pthread.h
@@ -99,10 +99,15 @@ int pthread_cond_wait(pthread_cond_t*, pthread_mutex_t*);
 int pthread_condattr_init(pthread_condattr_t*);
 int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
 int pthread_condattr_destroy(pthread_condattr_t*);
-int pthread_cancel(pthread_t);
 int pthread_cond_destroy(pthread_cond_t*);
 int pthread_cond_timedwait(pthread_cond_t*, pthread_mutex_t*, const struct timespec*);
 
+#define PTHREAD_CANCEL_ENABLE 1
+#define PTHREAD_CANCEL_DISABLE 2
+
+int pthread_cancel(pthread_t);
+int pthread_setcancelstate(int state, int* oldstate);
+int pthread_setcanceltype(int type, int* oldtype);
 void pthread_testcancel(void);
 
 int pthread_spin_destroy(pthread_spinlock_t*);