diff --git a/setup.py b/setup.py
index 171b128..8ca5808 100644
--- a/setup.py
+++ b/setup.py
@@ -422,6 +422,9 @@
         exts.append( Extension("_functools", ["_functoolsmodule.c"]) )
         # Memory-based IO accelerator modules
         exts.append( Extension("_bytesio", ["_bytesio.c"]) )
+        exts.append( Extension("_stringio", ["_stringio.c"]) )
+        # C-optimized pickle replacement
+        exts.append( Extension("_pickle", ["_pickle.c"]) )
         # atexit
         exts.append( Extension("atexit", ["atexitmodule.c"]) )
         # _json speedups