diff --git a/include/zephyr/posix/pthread.h b/include/zephyr/posix/pthread.h
index d978e914a5..2f942f6553 100644
--- a/include/zephyr/posix/pthread.h
+++ b/include/zephyr/posix/pthread.h
@@ -473,6 +473,7 @@ int pthread_key_create(pthread_key_t *key,
 int pthread_key_delete(pthread_key_t key);
 int pthread_setspecific(pthread_key_t key, const void *value);
 void *pthread_getspecific(pthread_key_t key);
+int pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void));
 
 /* Glibc / Oracle Extension Functions */
 
diff --git a/lib/posix/pthread.c b/lib/posix/pthread.c
index f2bbc07ae9..c5c00a5349 100644
--- a/lib/posix/pthread.c
+++ b/lib/posix/pthread.c
@@ -954,6 +954,15 @@ int pthread_getname_np(pthread_t thread, char *name, size_t len)
 #endif
 }
 
+int pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void))
+{
+	ARG_UNUSED(prepare);
+	ARG_UNUSED(parent);
+	ARG_UNUSED(child);
+
+	return ENOSYS;
+}
+
 static int posix_thread_pool_init(void)
 {
 	size_t i;