diff --git a/libc/startup/linux/riscv64/CMakeLists.txt b/libc/startup/linux/riscv64/CMakeLists.txt
index 14d6409af6cc1..14efe0e58f302 100644
--- a/libc/startup/linux/riscv64/CMakeLists.txt
+++ b/libc/startup/linux/riscv64/CMakeLists.txt
@@ -6,10 +6,12 @@ add_startup_object(
     libc.config.linux.app_h
     libc.include.sys_mman
     libc.include.sys_syscall
+    libc.src.__support.threads.thread
     libc.src.__support.OSUtil.osutil
     libc.src.stdlib.exit
     libc.src.stdlib.atexit
     libc.src.string.memory_utils.memcpy_implementation
+    libc.src.unistd.environ
   COMPILE_OPTIONS
     -fno-omit-frame-pointer
     -ffreestanding # To avoid compiler warnings about calling the main function.