diff --git a/lib/ExecutionEngine/Interpreter/Interpreter.h b/lib/ExecutionEngine/Interpreter/Interpreter.h
index 2f3ac2b..c685ba1 100644
--- a/lib/ExecutionEngine/Interpreter/Interpreter.h
+++ b/lib/ExecutionEngine/Interpreter/Interpreter.h
@@ -27,7 +27,7 @@
 struct FunctionInfo;
 template<typename T> class generic_gep_type_iterator;
 class ConstantExpr;
-typedef generic_gep_type_iterator<User::op_iterator> gep_type_iterator;
+typedef generic_gep_type_iterator<User::const_op_iterator> gep_type_iterator;
 
 
 // AllocaHolder - Object to track all of the blocks of memory allocated by