diff --git a/tools/cache/jsc/wasm32-unknown-none.pl b/tools/cache/jsc/wasm32-unknown-none.pl
index a15e8fef..7f74060f 100644
--- a/tools/cache/jsc/wasm32-unknown-none.pl
+++ b/tools/cache/jsc/wasm32-unknown-none.pl
@@ -19,6 +19,10 @@
           'S_IFDIR + 0777' => '16895',
           '__S_IFCHR + 0777' => '8703',
           '__S_IFREG + 0777' => '33279',
+          'default_sizes.memsize' => '134217728',
+          'default_sizes.stackbottom' => '133169152',
+          'default_sizes.stacksize' => '1048576',
+          'default_sizes.tablesize' => '65536',
           'direntp + &dirent::d_name' => 'direntp+19',
           'direntp[&dirent::d_ino] = 1' => 'this.HEAP32[direntp>>2] = 1; this.HEAP32[direntp+4>>2] = 0;',
           'direntp[&dirent::d_off] = "0"' => 'this.HEAP32[direntp+8>>2] = 0;',