diff --git a/Parser/bitset.c b/Parser/bitset.c
index b5543b8..f5bfd41 100644
--- a/Parser/bitset.c
+++ b/Parser/bitset.c
@@ -7,60 +7,60 @@
 bitset
 newbitset(int nbits)
 {
-	int nbytes = NBYTES(nbits);
-	bitset ss = (char *)PyObject_MALLOC(sizeof(BYTE) *  nbytes);
-	
-	if (ss == NULL)
-		Py_FatalError("no mem for bitset");
-	
-	ss += nbytes;
-	while (--nbytes >= 0)
-		*--ss = 0;
-	return ss;
+    int nbytes = NBYTES(nbits);
+    bitset ss = (char *)PyObject_MALLOC(sizeof(BYTE) *  nbytes);
+
+    if (ss == NULL)
+        Py_FatalError("no mem for bitset");
+
+    ss += nbytes;
+    while (--nbytes >= 0)
+        *--ss = 0;
+    return ss;
 }
 
 void
 delbitset(bitset ss)
 {
-	PyObject_FREE(ss);
+    PyObject_FREE(ss);
 }
 
 int
 addbit(bitset ss, int ibit)
 {
-	int ibyte = BIT2BYTE(ibit);
-	BYTE mask = BIT2MASK(ibit);
-	
-	if (ss[ibyte] & mask)
-		return 0; /* Bit already set */
-	ss[ibyte] |= mask;
-	return 1;
+    int ibyte = BIT2BYTE(ibit);
+    BYTE mask = BIT2MASK(ibit);
+
+    if (ss[ibyte] & mask)
+        return 0; /* Bit already set */
+    ss[ibyte] |= mask;
+    return 1;
 }
 
 #if 0 /* Now a macro */
 int
 testbit(bitset ss, int ibit)
 {
-	return (ss[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0;
+    return (ss[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0;
 }
 #endif
 
 int
 samebitset(bitset ss1, bitset ss2, int nbits)
 {
-	int i;
-	
-	for (i = NBYTES(nbits); --i >= 0; )
-		if (*ss1++ != *ss2++)
-			return 0;
-	return 1;
+    int i;
+
+    for (i = NBYTES(nbits); --i >= 0; )
+        if (*ss1++ != *ss2++)
+            return 0;
+    return 1;
 }
 
 void
 mergebitset(bitset ss1, bitset ss2, int nbits)
 {
-	int i;
-	
-	for (i = NBYTES(nbits); --i >= 0; )
-		*ss1++ |= *ss2++;
+    int i;
+
+    for (i = NBYTES(nbits); --i >= 0; )
+        *ss1++ |= *ss2++;
 }