diff --git a/LibC/unistd.cpp b/LibC/unistd.cpp
index e551f479a6..88f4bca542 100644
--- a/LibC/unistd.cpp
+++ b/LibC/unistd.cpp
@@ -451,10 +451,10 @@ int create_thread(int(*entry)(void*), void* argument)
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
-int exit_thread(int code)
+void exit_thread(int code)
 {
-    int rc = syscall(SC_exit_thread, code);
-    __RETURN_WITH_ERRNO(rc, rc, -1);
+    syscall(SC_exit_thread, code);
+    ASSERT_NOT_REACHED();
 }
 
 int ftruncate(int fd, off_t length)