diff --git a/System/Posix/Fcntl.hsc b/System/Posix/Fcntl.hsc
index a45f559aa21eb40b66119838b15f6cb9347c53d0..7760bb5f80da27aec5d2bef19c3b4cff6195d9fe 100644
--- a/System/Posix/Fcntl.hsc
+++ b/System/Posix/Fcntl.hsc
@@ -1,5 +1,7 @@
 {-# LANGUAGE CApiFFI #-}
-#ifdef __GLASGOW_HASKELL__
+#if __GLASGOW_HASKELL__ >= 709
+{-# LANGUAGE Safe #-}
+#elif __GLASGOW_HASKELL__ >= 703
 {-# LANGUAGE Trustworthy #-}
 #endif
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