diff --git a/Python/structmember.c b/Python/structmember.c
index 711cfe5..8e37184 100644
--- a/Python/structmember.c
+++ b/Python/structmember.c
@@ -266,7 +266,7 @@
 		break;
 		}
 	case T_STRING:
-        case T_STRING_INPLACE:
+	case T_STRING_INPLACE:
 		PyErr_SetString(PyExc_TypeError, "readonly attribute");
 		return -1;
 #ifdef HAVE_LONG_LONG