diff --git a/src/GF/Infra/Dependencies.hs b/src/GF/Infra/Dependencies.hs
index 1eff523b8..43fe4f458 100644
--- a/src/GF/Infra/Dependencies.hs
+++ b/src/GF/Infra/Dependencies.hs
@@ -3,7 +3,6 @@ module GF.Infra.Dependencies (
   ) where
 
 import GF.Grammar.Grammar
-import GF.Grammar.PrGrammar
 import GF.Infra.Modules
 import GF.Infra.Ident
 
@@ -19,31 +18,34 @@ prDepGraph deps = unlines $ [
   "}"
   ]
  where
-   mkNode (i,dep) = unwords [prt i, "[",nodeAttr (modtype dep),"]"]
+   mkNode (i,dep) = unwords [prIdent i, "[",nodeAttr (modtype dep),"]"]
    nodeAttr ty = case ty of
        MTAbstract   -> "style = \"solid\", shape = \"box\""
        MTConcrete _ -> "style = \"solid\", shape = \"ellipse\""
        _ -> "style = \"dashed\", shape = \"ellipse\""
    mkArrows (i,dep) = 
-     [unwords [prt i,"->",prt j,"[",arrowAttr "of","]"] | j <- ofs dep] ++
-     [unwords [prt i,"->",prt j,"[",arrowAttr "ex","]"] | j <- extendeds dep] ++
-     [unwords [prt i,"->",prt j,"[",arrowAttr "op","]"] | j <- openeds dep]
+     [unwords [prIdent i,"->",prIdent j,"[",arrowAttr "of","]"] | j <- ofs dep] ++
+     [unwords [prIdent i,"->",prIdent j,"[",arrowAttr "ex","]"] | j <- extendeds dep] ++
+     [unwords [prIdent i,"->",prIdent j,"[",arrowAttr "op","]"] | j <- openeds dep] ++
+     [unwords [prIdent i,"->",prIdent j,"[",arrowAttr "ed","]"] | j <- extrads dep]
    arrowAttr s = case s of
      "of" -> "style = \"solid\", arrowhead = \"empty\""
      "ex" -> "style = \"solid\""
      "op" -> "style = \"dashed\""
+     "ed" -> "style = \"dotted\""
 
 data ModDeps = ModDeps {
   modtype    :: ModuleType Ident,
   ofs        :: [Ident],
   extendeds  :: [Ident], 
   openeds    :: [Ident],
+  extrads    :: [Ident],
   functors   :: [Ident],
   interfaces :: [Ident],
   instances  :: [Ident]
   }
 
-noModDeps = ModDeps MTAbstract [] [] [] [] [] []
+noModDeps = ModDeps MTAbstract [] [] [] [] [] [] []
 
 grammar2moddeps :: SourceGrammar -> [(Ident,ModDeps)]
 grammar2moddeps gr = [(i,depMod m) | (i,m) <- modules gr] where
@@ -54,5 +56,6 @@ grammar2moddeps gr = [(i,depMod m) | (i,m) <- modules gr] where
                 MTInstance i -> [i]
                 _ -> [],
     extendeds = map fst (extend m),
-    openeds = map openedModule (opens m)
+    openeds = map openedModule (opens m),
+    extrads = mexdeps m
     }