diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index 2c7cdbc8e99e37081200900866b94edf7672e272..4b1693cbd1ab92c67090a790cdde9e244c9d5f57 100644
--- a/lib/std/Io/Threaded.zig
+++ b/lib/std/Io/Threaded.zig
@@ -15214,7 +15214,7 @@ fn processReplace(userdata: ?*anyopaque, options: process.ReplaceOptions) proces
         });
     };
 
-    if (is_darwin) if (t.spawnDarwin(
+    if (is_darwin and process.can_spawn) if (t.spawnDarwin(
         .replace,
         options.exe,
         argv_buf.ptr,