diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index 77506faae7e9f30f792cd840c8ac6ba347c89b4d..f7ab012863292c7e8b1ddb6f99a382c1eb1e56e3 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,