diff --git a/Include/abstract.h b/Include/abstract.h
index a870f69c928..333b15ea204 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -754,7 +754,7 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
        */
 
      int PySequence_Contains Py_PROTO((PyObject *o, PyObject *value));
-     #define PySequence_In PySequence_Contains
+#define PySequence_In PySequence_Contains
 
        /*
 	 Determine if o contains value.  If an item in o is equal to