diff --git a/lib/std/process.zig b/lib/std/process.zig
index 5fb36f991d..e55ce7ff41 100644
--- a/lib/std/process.zig
+++ b/lib/std/process.zig
@@ -1760,6 +1760,7 @@ pub fn cleanExit() void {
     if (builtin.mode == .Debug) {
         return;
     } else {
+        std.debug.lockStdErr();
         exit(0);
     }
 }