diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 41076bc941d..1e3ed77be3a 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -3572,7 +3572,7 @@ module ts {
             // A common error is to try to declare an accessor in an ambient class.
             if (inAmbientContext && canParseSemicolon()) {
                 parseSemicolon();
-                node.body = createMissingNode();
+                node.body = <Block>createMissingNode();
             }
             else {
                 node.body = parseBody(/* ignoreMissingOpenBrace */ false);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 066d2f2d428..78f07970f11 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -336,13 +336,20 @@ module ts {
 
     export interface FunctionDeclaration extends FunctionLike {
         name: Identifier;
+        body?: Block;
     }
 
-    export interface MethodDeclaration extends FunctionLike { }
+    export interface MethodDeclaration extends FunctionLike {
+        body?: Block;
+    }
 
-    export interface ConstructorDeclaration extends FunctionLike { }
+    export interface ConstructorDeclaration extends FunctionLike {
+        body?: Block;
+    }
 
-    export interface AccessorDeclaration extends FunctionLike { }
+    export interface AccessorDeclaration extends FunctionLike {
+        body?: Block;
+    }
 
     export interface TypeNode extends Node { }