diff -Naur llvm-3.6.0.src.orig/bindings/ocaml/executionengine/llvm_executionengine.ml llvm-3.6.0.src/bindings/ocaml/executionengine/llvm_executionengine.ml
--- llvm-3.6.0.src.orig/bindings/ocaml/executionengine/llvm_executionengine.ml	2015-03-17 11:49:27.274824345 +0100
+++ llvm-3.6.0.src/bindings/ocaml/executionengine/llvm_executionengine.ml	2015-03-17 11:49:40.333829421 +0100
@@ -43,11 +43,11 @@
   = "llvm_ee_run_static_dtors"
 external data_layout : llexecutionengine -> Llvm_target.DataLayout.t
   = "llvm_ee_get_data_layout"
-external add_global_mapping_ : Llvm.llvalue -> int64 -> llexecutionengine -> unit
+external add_global_mapping_ : Llvm.llvalue -> nativeint -> llexecutionengine -> unit
   = "llvm_ee_add_global_mapping"
-external get_global_value_address_ : string -> llexecutionengine -> int64
+external get_global_value_address_ : string -> llexecutionengine -> nativeint
   = "llvm_ee_get_global_value_address"
-external get_function_address_ : string -> llexecutionengine -> int64
+external get_function_address_ : string -> llexecutionengine -> nativeint
   = "llvm_ee_get_function_address"
 
 let add_global_mapping llval ptr ee =
@@ -55,14 +55,14 @@
 
 let get_global_value_address name typ ee =
   let vptr = get_global_value_address_ name ee in
-  if Int64.to_int vptr <> 0 then
+  if Nativeint.to_int vptr <> 0 then
     let open Ctypes in !@ (coerce (ptr void) (ptr typ) (ptr_of_raw_address vptr))
   else
     raise (Error ("Value " ^ name ^ " not found"))
 
 let get_function_address name typ ee =
   let fptr = get_function_address_ name ee in
-  if Int64.to_int fptr <> 0 then
+  if Nativeint.to_int fptr <> 0 then
     let open Ctypes in coerce (ptr void) typ (ptr_of_raw_address fptr)
   else
     raise (Error ("Function " ^ name ^ " not found"))