diff --git a/persistent-test/src/LargeNumberTest.hs b/persistent-test/src/LargeNumberTest.hs
index 5fb94f806..c80559d30 100644
--- a/persistent-test/src/LargeNumberTest.hs
+++ b/persistent-test/src/LargeNumberTest.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE TypeIperators #-}
+{-# LANGUAGE TypeOperators #-}
 {-# LANGUAGE UndecidableInstances #-}
 module LargeNumberTest where