diff --git a/Include/bitset.h b/Include/bitset.h
index a6905b2..e3ef1a1 100644
--- a/Include/bitset.h
+++ b/Include/bitset.h
@@ -1,9 +1,3 @@
-#ifndef Py_BITSET_H
-#define Py_BITSET_H
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /***********************************************************
 Copyright (c) 2000, BeOpen.com.
 Copyright (c) 1995-2000, Corporation for National Research Initiatives.
@@ -14,18 +8,24 @@
 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 ******************************************************************/
 
+#ifndef Py_BITSET_H
+#define Py_BITSET_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Bitset interface */
 
 #define BYTE		char
 
 typedef BYTE *bitset;
 
-bitset newbitset Py_PROTO((int nbits));
-void delbitset Py_PROTO((bitset bs));
+bitset newbitset(int nbits);
+void delbitset(bitset bs);
 #define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0)
-int addbit Py_PROTO((bitset bs, int ibit)); /* Returns 0 if already set */
-int samebitset Py_PROTO((bitset bs1, bitset bs2, int nbits));
-void mergebitset Py_PROTO((bitset bs1, bitset bs2, int nbits));
+int addbit(bitset bs, int ibit); /* Returns 0 if already set */
+int samebitset(bitset bs1, bitset bs2, int nbits);
+void mergebitset(bitset bs1, bitset bs2, int nbits);
 
 #define BITSPERBYTE	(8*sizeof(BYTE))
 #define NBYTES(nbits)	(((nbits) + BITSPERBYTE - 1) / BITSPERBYTE)