diff --git a/base/usr/include/pthread.h b/base/usr/include/pthread.h
index 48a9fd93..eeae188a 100644
--- a/base/usr/include/pthread.h
+++ b/base/usr/include/pthread.h
@@ -19,4 +19,24 @@ extern int pthread_kill(pthread_t thread, int sig);
 extern int clone(uintptr_t,uintptr_t,void*);
 extern int gettid();
 
+extern void pthread_cleanup_push(void (*routine)(void *), void *arg);
+extern void pthread_cleanup_pop(int execute);
+
+typedef int volatile pthread_mutex_t;
+typedef int pthread_mutexattr_t;
+
+extern int pthread_join(pthread_t thread, void **retval);
+
+#define PTHREAD_MUTEX_INITIALIZER 0
+
+extern int pthread_mutex_lock(pthread_mutex_t *mutex);
+extern int pthread_mutex_trylock(pthread_mutex_t *mutex);
+extern int pthread_mutex_unlock(pthread_mutex_t *mutex);
+extern int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr);
+extern int pthread_mutex_destroy(pthread_mutex_t *mutex);
+
+extern int pthread_attr_init(pthread_attr_t *attr);
+extern int pthread_attr_destroy(pthread_attr_t *attr);
+
+
 _End_C_Header
diff --git a/libc/pthread/pthread.c b/libc/pthread/pthread.c
index 7f6c95c3..9e03857e 100644
--- a/libc/pthread/pthread.c
+++ b/libc/pthread/pthread.c
@@ -10,6 +10,8 @@
 #include <pthread.h>
 #include <errno.h>
 
+#include <sys/wait.h>
+
 DEFN_SYSCALL3(clone, SYS_CLONE, uintptr_t, uintptr_t, void *);
 DEFN_SYSCALL0(gettid, SYS_GETTID);
 
@@ -45,3 +47,57 @@ void pthread_exit(void * value) {
 	void (*magic_exit_func)(void) = (void *)magic_exit_target;
 	magic_exit_func();
 }
+
+void pthread_cleanup_push(void (*routine)(void *), void *arg) {
+	/* do nothing */
+}
+
+void pthread_cleanup_pop(int execute) {
+	/* do nothing */
+}
+
+int pthread_mutex_lock(pthread_mutex_t *mutex) {
+	while (__sync_lock_test_and_set(mutex, 0x01)) {
+		syscall_yield();
+	}
+	return 0;
+}
+
+int pthread_mutex_trylock(pthread_mutex_t *mutex) {
+	if (__sync_lock_test_and_set(mutex, 0x01)) {
+		return EBUSY;
+	}
+	return 0;
+}
+
+int pthread_mutex_unlock(pthread_mutex_t *mutex) {
+	__sync_lock_release(mutex);
+	return 0;
+}
+
+int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr) {
+	*mutex = 0;
+	return 0;
+}
+
+int pthread_mutex_destroy(pthread_mutex_t *mutex) {
+	return 0;
+}
+
+int pthread_attr_init(pthread_attr_t *attr) {
+	*attr = 0;
+	return 0;
+}
+
+int pthread_attr_destroy(pthread_attr_t *attr) {
+	return 0;
+}
+
+int pthread_join(pthread_t thread, void **retval) {
+	int status;
+	int result = waitpid(thread.id, &status, 0);
+	if (retval) {
+		*retval = (void*)status;
+	}
+	return result;
+}