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diff --git a/src/elab_util_pos.sig b/src/elab_util_pos.sig
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+(* Copyright (c) 2008-2010, 2012, Adam Chlipala
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * - The names of contributors may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *)
+
+(* This is identical to ELAB_UTIL, but keeps source spans around *)
+(* Maybe these modules can be unified? *)
+
+signature ELAB_UTIL_POS = sig 
+    
+    val mliftConInCon : (int -> Elab.con -> Elab.con) ref
+
+    structure Decl : sig 
+                  datatype binder =
+                           RelK of string
+                           | RelC of string * Elab.kind
+                           | NamedC of string * int * Elab.kind * Elab.con option
+                           | RelE of string * Elab.con
+                           | NamedE of string * Elab.con
+                           | Str of string * int * Elab.sgn
+                           | Sgn of string * int * Elab.sgn
+                  
+                  val fold : {kind : Elab.kind * 'state -> 'state,
+                              con : Elab.con * 'state -> 'state,
+                              exp : Elab.exp * 'state -> 'state,
+                              sgn_item : Elab.sgn_item * 'state -> 'state,
+                              sgn : Elab.sgn * 'state -> 'state,
+                              str : Elab.str * 'state -> 'state,
+                              decl : Elab.decl * 'state -> 'state}
+                             -> 'state -> Elab.decl -> 'state
+
+                  val foldB : {kind : 'context * Elab.kind * 'state -> 'state,
+                              con : 'context * Elab.con * 'state -> 'state,
+                              exp : 'context * Elab.exp * 'state -> 'state,
+                              sgn_item : 'context * Elab.sgn_item * 'state -> 'state,
+                              sgn : 'context * Elab.sgn * 'state -> 'state,
+                              str : 'context * Elab.str * 'state -> 'state,
+                              decl : 'context * Elab.decl * 'state -> 'state,
+                              bind: 'context * binder -> 'context
+                              }
+                             -> 'context -> 'state -> Elab.decl -> 'state
+              end
+
+end