1 files changed, 6 insertions, 1 deletions
diff --git a/compiler/backpack/BkpSyn.hs b/compiler/backpack/BkpSyn.hs
index e019d03b24..a7e4db30dd 100644
--- a/compiler/backpack/BkpSyn.hs
+++ b/compiler/backpack/BkpSyn.hs
@@ -68,7 +68,12 @@ type LHsUnitDecl n = Located (HsUnitDecl n)
 -- | An include of another unit
 data IncludeDecl n = IncludeDecl {
         idUnitId :: LHsUnitId n,
-        idModRenaming :: Maybe [ LRenaming ]
+        idModRenaming :: Maybe [ LRenaming ],
+        -- | Is this a @dependency signature@ include?  If so,
+        -- we don't compile this include when we instantiate this
+        -- unit (as there should not be any modules brought into
+        -- scope.)
+        idSignatureInclude :: Bool
     }
 
 -- | Rename a module from one name to another.  The identity renaming