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-rw-r--r--compiler/utils/FastMutInt.hs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/utils/FastMutInt.hs b/compiler/utils/FastMutInt.hs
index 2a6e7b83aa..6ba139a486 100644
--- a/compiler/utils/FastMutInt.hs
+++ b/compiler/utils/FastMutInt.hs
@@ -15,6 +15,8 @@ module FastMutInt(
readFastMutPtr, writeFastMutPtr
) where
+import GhcPrelude
+
import Data.Bits
import GHC.Base
import GHC.Ptr