diff --git a/Include/bufferobject.h b/Include/bufferobject.h
index 62805e0..0bdc4c5 100644
--- a/Include/bufferobject.h
+++ b/Include/bufferobject.h
@@ -46,13 +46,13 @@
 
 #define Py_END_OF_BUFFER	(-1)
 
-extern PyObject *PyBuffer_FromObject Py_PROTO((PyObject *base, int offset, int size));
-extern PyObject *PyBuffer_FromReadWriteObject Py_PROTO((PyObject *base, int offset, int size));
+extern DL_IMPORT(PyObject *) PyBuffer_FromObject Py_PROTO((PyObject *base, int offset, int size));
+extern DL_IMPORT(PyObject *) PyBuffer_FromReadWriteObject Py_PROTO((PyObject *base, int offset, int size));
 
-extern PyObject *PyBuffer_FromMemory Py_PROTO((void *ptr, int size));
-extern PyObject *PyBuffer_FromReadWriteMemory Py_PROTO((void *ptr, int size));
+extern DL_IMPORT(PyObject *) PyBuffer_FromMemory Py_PROTO((void *ptr, int size));
+extern DL_IMPORT(PyObject *) PyBuffer_FromReadWriteMemory Py_PROTO((void *ptr, int size));
 
-extern PyObject *PyBuffer_New Py_PROTO((int size));
+extern DL_IMPORT(PyObject *) PyBuffer_New Py_PROTO((int size));
 
 #ifdef __cplusplus
 }