diff --git a/Mac/Modules/osa/_OSAmodule.c b/Mac/Modules/osa/_OSAmodule.c
index aceded4..45e7baf 100644
--- a/Mac/Modules/osa/_OSAmodule.c
+++ b/Mac/Modules/osa/_OSAmodule.c
@@ -15,6 +15,9 @@
     }} while(0)
 
 
+#if PY_VERSION_HEX < 0x02040000
+PyObject *PyMac_GetOSErrException(void);
+#endif
 #include <Carbon/Carbon.h>
 
 #ifdef USE_TOOLBOX_OBJECT_GLUE
diff --git a/Mac/Modules/osa/osasupport.py b/Mac/Modules/osa/osasupport.py
index 7e70223..fe320e8 100644
--- a/Mac/Modules/osa/osasupport.py
+++ b/Mac/Modules/osa/osasupport.py
@@ -20,6 +20,9 @@
 # Create the type objects
 
 includestuff = includestuff + """
+#if PY_VERSION_HEX < 0x02040000
+PyObject *PyMac_GetOSErrException(void);
+#endif
 #include <Carbon/Carbon.h>
 
 #ifdef USE_TOOLBOX_OBJECT_GLUE
diff --git a/Mac/Modules/osa/setup.py b/Mac/Modules/osa/setup.py
new file mode 100644
index 0000000..82e7742
--- /dev/null
+++ b/Mac/Modules/osa/setup.py
@@ -0,0 +1,13 @@
+# This is a temporary setup script to allow distribution of
+# MacPython 2.4 modules for MacPython 2.3.
+
+from distutils.core import Extension, setup
+
+setup(name="OSA", version="0.1",
+	ext_modules=[
+		Extension('_OSA', ['_OSAmodule.c'],
+		extra_link_args=['-framework', 'Carbon'])
+	],
+	py_modules=['OSA.OSA', 'OSA.OSAconst'],
+	package_dir={'OSA':'../../../Lib/plat-mac/Carbon'}
+	)