diff --git a/src/com/google/javascript/jscomp/CodingConvention.java b/src/com/google/javascript/jscomp/CodingConvention.java
index ab2dab06bcf..f556f9dc8d3 100644
--- a/src/com/google/javascript/jscomp/CodingConvention.java
+++ b/src/com/google/javascript/jscomp/CodingConvention.java
@@ -277,10 +277,11 @@ public void applyDelegateRelationship(
   public String getDelegateSuperclassName();
 
   /**
-   * Checks for getprops that set the calling conventions on delegate methods.
+   * Checks for function calls that set the calling conventions on delegate
+   * methods.
    */
-  public void checkForCallingConventionDefinitions(
-      Node getPropNode, Map<String, String> delegateCallingConventions);
+  public void checkForCallingConventionDefiningCalls(
+      Node n, Map<String, String> delegateCallingConventions);
 
   /**
    * Defines the delegate proxy prototype properties. Their types depend on
diff --git a/src/com/google/javascript/jscomp/CodingConventions.java b/src/com/google/javascript/jscomp/CodingConventions.java
index a54b10a79d7..82aa86e0d21 100644
--- a/src/com/google/javascript/jscomp/CodingConventions.java
+++ b/src/com/google/javascript/jscomp/CodingConventions.java
@@ -250,9 +250,9 @@ public String getDelegateSuperclassName() {
     }
 
     @Override
-    public void checkForCallingConventionDefinitions(
+    public void checkForCallingConventionDefiningCalls(
         Node n, Map<String, String> delegateCallingConventions) {
-      nextConvention.checkForCallingConventionDefinitions(
+      nextConvention.checkForCallingConventionDefiningCalls(
           n, delegateCallingConventions);
     }
 
@@ -510,7 +510,7 @@ public String getDelegateSuperclassName() {
     }
 
     @Override
-    public void checkForCallingConventionDefinitions(Node n,
+    public void checkForCallingConventionDefiningCalls(Node n,
         Map<String, String> delegateCallingConventions) {
       // do nothing.
     }
diff --git a/src/com/google/javascript/jscomp/TypedScopeCreator.java b/src/com/google/javascript/jscomp/TypedScopeCreator.java
index ea44f899ecd..676720e1f29 100644
--- a/src/com/google/javascript/jscomp/TypedScopeCreator.java
+++ b/src/com/google/javascript/jscomp/TypedScopeCreator.java
@@ -533,6 +533,7 @@ public void visit(NodeTraversal t, Node n, Node parent) {
       switch (n.getToken()) {
         case CALL:
           checkForClassDefiningCalls(n);
+          checkForCallingConventionDefiningCalls(n, delegateCallingConventions);
           break;
 
         case FUNCTION:
@@ -565,7 +566,6 @@ public void visit(NodeTraversal t, Node n, Node parent) {
           break;
 
         case GETPROP:
-          checkForCallingConventionDefinitions(n);
           // Handle stubbed properties.
           if (parent.isExprResult() &&
               n.isQualifiedName()) {
@@ -1473,10 +1473,12 @@ private JSType lookupQualifiedName(Node n) {
     }
 
     /**
-     * Look for expressions that set a delegate method's calling convention.
+     * Look for calls that set a delegate method's calling convention.
      */
-    private void checkForCallingConventionDefinitions(Node n) {
-      codingConvention.checkForCallingConventionDefinitions(n, delegateCallingConventions);
+    private void checkForCallingConventionDefiningCalls(
+        Node n, Map<String, String> delegateCallingConventions) {
+      codingConvention.checkForCallingConventionDefiningCalls(n,
+          delegateCallingConventions);
     }
 
     /**
@@ -1576,12 +1578,12 @@ private void applyDelegateRelationship(
 
           FunctionType delegateProxy =
               typeRegistry.createConstructorType(
-                  delegateBaseObject.getReferenceName() + DELEGATE_PROXY_SUFFIX /* name */,
-                  null /* source */,
-                  null /* parameters */,
-                  null /* returnType */,
-                  null /* templateKeys */,
-                  false /* isAbstract */);
+                  delegateBaseObject.getReferenceName() + DELEGATE_PROXY_SUFFIX,
+                  null,
+                  null,
+                  null,
+                  null,
+                  false);
           delegateProxy.setPrototypeBasedOn(delegateBaseObject);
 
           codingConvention.applyDelegateRelationship(
@@ -1693,6 +1695,20 @@ void maybeDeclareQualifiedName(NodeTraversal t, JSDocInfo info,
         // If the property is already declared, the error will be
         // caught when we try to declare it in the current scope.
         defineSlot(n, parent, valueType, inferred);
+      } else if (rhsValue != null && rhsValue.isTrue()) {
+        // We declare these for delegate proxy method properties.
+        ObjectType ownerType = getObjectSlot(ownerName);
+        FunctionType ownerFnType = JSType.toMaybeFunctionType(ownerType);
+        if (ownerFnType != null) {
+          JSType ownerTypeOfThis = ownerFnType.getTypeOfThis();
+          String delegateName = codingConvention.getDelegateSuperclassName();
+          JSType delegateType = delegateName == null ?
+              null : typeRegistry.getType(delegateName);
+          if (delegateType != null &&
+              ownerTypeOfThis.isSubtype(delegateType)) {
+            defineSlot(n, parent, getNativeType(BOOLEAN_TYPE), true);
+          }
+        }
       }
     }