1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rename/RnNames.lhs b/compiler/rename/RnNames.lhs
index 46058c4677..3867e17693 100644
--- a/compiler/rename/RnNames.lhs
+++ b/compiler/rename/RnNames.lhs
@@ -1256,7 +1256,9 @@ warnUnusedImportDecls gbl_env
        ; ifDOptM Opt_D_dump_minimal_imports $
          printMinimalImports usage }
   where
-    explicit_import (L loc _) = isGoodSrcSpan loc
+    explicit_import (L loc _) = case loc of
+                                UnhelpfulSpan _ -> False
+                                RealSrcSpan _ -> True
         -- Filter out the implicit Prelude import
         -- which we do not want to bleat about
 \end{code}