diff --git a/src/Orchard.Web/Modules/Orchard.Scripting/Ast/BinaryAstNode.cs b/src/Orchard.Web/Modules/Orchard.Scripting/Ast/BinaryAstNode.cs
index 1764fc60c..6066fcbee 100644
--- a/src/Orchard.Web/Modules/Orchard.Scripting/Ast/BinaryAstNode.cs
+++ b/src/Orchard.Web/Modules/Orchard.Scripting/Ast/BinaryAstNode.cs
@@ -27,8 +27,7 @@ namespace Orchard.Scripting.Ast {
 
         public override IEnumerable<AstNode> Children {
             get {
-                yield return _left;
-                yield return _right;
+                return new List<AstNode>(2) { _left, _right };
             }
         }
 
diff --git a/src/Orchard.Web/Modules/Orchard.Scripting/Ast/UnaryAstNode.cs b/src/Orchard.Web/Modules/Orchard.Scripting/Ast/UnaryAstNode.cs
index d26449df7..bec5a5f7e 100644
--- a/src/Orchard.Web/Modules/Orchard.Scripting/Ast/UnaryAstNode.cs
+++ b/src/Orchard.Web/Modules/Orchard.Scripting/Ast/UnaryAstNode.cs
@@ -16,7 +16,9 @@ namespace Orchard.Scripting.Ast {
         public AstNode Operand { get { return _operand; } }
 
         public override IEnumerable<AstNode> Children {
-            get { yield return _operand; }
+            get {
+                return new List<AstNode>(1) { _operand };
+            }
         }
 
         public override object Accept(AstVisitor visitor) {