diff --git a/Objects/abstract.c b/Objects/abstract.c
index 16e0270..46288dd 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -2300,7 +2300,7 @@
 		}
 		return ok;
 	}
-    return recursive_isinstance(inst, cls, Py_GetRecursionLimit());
+	return recursive_isinstance(inst, cls, Py_GetRecursionLimit());
 }
 
 static  int
@@ -2374,7 +2374,7 @@
 		}
 		return ok;
 	}
-    return recursive_issubclass(derived, cls, Py_GetRecursionLimit());
+	return recursive_issubclass(derived, cls, Py_GetRecursionLimit());
 }