Fix build on x86_64

diff --git a/compiler/cmm/PprC.hs b/compiler/cmm/PprC.hs
index de5bf0a..90599d7 100644 (file)
--- a/compiler/cmm/PprC.hs
+++ b/compiler/cmm/PprC.hs
@@ -56,6 +56,10 @@ import Data.Array.ST
 #endif
 import Control.Monad.ST
 
+#if x86_64_TARGET_ARCH
+import StaticFlags     ( opt_Unregisterised )
+#endif
+
 -- --------------------------------------------------------------------------
 -- Top level