diff --git a/core/src/Streamly/Internal/Data/MutArray/Type.hs b/core/src/Streamly/Internal/Data/MutArray/Type.hs
index 4ce952bba8..62361b8828 100644
--- a/core/src/Streamly/Internal/Data/MutArray/Type.hs
+++ b/core/src/Streamly/Internal/Data/MutArray/Type.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP #-}
-{-# LANGUAGE UnboxedTuples #-}
 {-# LANGUAGE UnliftedFFITypes #-}
 -- |
 -- Module      : Streamly.Internal.Data.MutArray.Type