Add System.Collections.ObjectModel.ReadOnlyDictionary.

1 files changed, 2 insertions, 2 deletions

diff --git a/mcs/class/dlr/Runtime/Microsoft.Scripting.Core/Compiler/HoistedLocals.cs b/mcs/class/dlr/Runtime/Microsoft.Scripting.Core/Compiler/HoistedLocals.cs
index b6db15ad2e2..ddb304be986 100644
--- a/mcs/class/dlr/Runtime/Microsoft.Scripting.Core/Compiler/HoistedLocals.cs
+++ b/mcs/class/dlr/Runtime/Microsoft.Scripting.Core/Compiler/HoistedLocals.cs
@@ -64,7 +64,7 @@ namespace System.Linq.Expressions.Compiler {
         internal readonly HoistedLocals Parent;
 
         // A mapping of hoisted variables to their indexes in the array
-        internal readonly ReadOnlyDictionary<Expression, int> Indexes;
+        internal readonly System.Dynamic.Utils.ReadOnlyDictionary<Expression, int> Indexes;
 
         // The variables, in the order they appear in the array
         internal readonly ReadOnlyCollection<ParameterExpression> Variables;
@@ -87,7 +87,7 @@ namespace System.Linq.Expressions.Compiler {
             SelfVariable = Expression.Variable(typeof(object[]), null);
             Parent = parent;
             Variables = vars;
-            Indexes = new ReadOnlyDictionary<Expression, int>(indexes);
+            Indexes = new System.Dynamic.Utils.ReadOnlyDictionary<Expression, int>(indexes);
         }
 
         internal ParameterExpression ParentVariable {