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-rw-r--r--src/compiler/GF/Interactive.hs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/compiler/GF/Interactive.hs b/src/compiler/GF/Interactive.hs
index 676511680..a3a02af78 100644
--- a/src/compiler/GF/Interactive.hs
+++ b/src/compiler/GF/Interactive.hs
@@ -38,6 +38,8 @@ import GF.Server(server)
#endif
import GF.Command.Messages(welcome)
+-- Needed to make it compile on GHC < 8
+import Control.Monad.Trans.Instances ()
-- | Run the GF Shell in quiet mode (@gf -run@).
mainRunGFI :: Options -> [FilePath] -> IO ()