diff --git a/Modules/operator.c b/Modules/operator.c
index 4e9111d..44b44f9 100644
--- a/Modules/operator.c
+++ b/Modules/operator.c
@@ -131,7 +131,7 @@
 spami(isSequenceType   , PySequence_Check)
 spam2(op_concat        , PySequence_Concat)
 spamoi(op_repeat       , PySequence_Repeat)
-spami2(sequenceIncludes, PySequence_In)
+spami2(sequenceIncludes, PySequence_Contains)
 spami2(indexOf         , PySequence_Index)
 spami2(countOf         , PySequence_Count)
 spami(isMappingType    , PyMapping_Check)