diff --git a/Include/structseq.h b/Include/structseq.h
index a482bd8..0b8d387 100644
--- a/Include/structseq.h
+++ b/Include/structseq.h
@@ -8,35 +8,35 @@
 #endif
 
 typedef struct PyStructSequence_Field {
-	char *name;
-	char *doc;
+    char *name;
+    char *doc;
 } PyStructSequence_Field;
 
 typedef struct PyStructSequence_Desc {
-	char *name;
-	char *doc;
-	struct PyStructSequence_Field *fields;
-	int n_in_sequence;
+    char *name;
+    char *doc;
+    struct PyStructSequence_Field *fields;
+    int n_in_sequence;
 } PyStructSequence_Desc;
 
 extern char* PyStructSequence_UnnamedField;
 
 PyAPI_FUNC(void) PyStructSequence_InitType(PyTypeObject *type,
-					   PyStructSequence_Desc *desc);
+                                           PyStructSequence_Desc *desc);
 
 PyAPI_FUNC(PyObject *) PyStructSequence_New(PyTypeObject* type);
 
 typedef struct {
-	PyObject_VAR_HEAD
-	PyObject *ob_item[1];
+    PyObject_VAR_HEAD
+    PyObject *ob_item[1];
 } PyStructSequence;
 
 /* Macro, *only* to be used to fill in brand new objects */
 #define PyStructSequence_SET_ITEM(op, i, v) \
-	(((PyStructSequence *)(op))->ob_item[i] = v)
+    (((PyStructSequence *)(op))->ob_item[i] = v)
 
 #define PyStructSequence_GET_ITEM(op, i) \
-	(((PyStructSequence *)(op))->ob_item[i])
+    (((PyStructSequence *)(op))->ob_item[i])
 
 
 #ifdef __cplusplus