diff --git a/persistent/test/Database/Persist/TH/CompositeKeyPathMultiPieceSpec.hs b/persistent/test/Database/Persist/TH/CompositeKeyPathMultiPieceSpec.hs
index 69154079d..712a673f3 100644
--- a/persistent/test/Database/Persist/TH/CompositeKeyPathMultiPieceSpec.hs
+++ b/persistent/test/Database/Persist/TH/CompositeKeyPathMultiPieceSpec.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP #-}
+
 #if MIN_VERSION_GLASGOW_HASKELL(8,6,1,0)
 
 {-# LANGUAGE DataKinds #-}