diff --git a/src/com/google/javascript/jscomp/ConformanceRules.java b/src/com/google/javascript/jscomp/ConformanceRules.java
index f728088d8da..5ebba24ee7f 100644
--- a/src/com/google/javascript/jscomp/ConformanceRules.java
+++ b/src/com/google/javascript/jscomp/ConformanceRules.java
@@ -1452,9 +1452,11 @@ protected ConformanceResult checkConformance(NodeTraversal t, Node n) {
 
       JSDocInfo ownJsDoc = n.getFirstChild().getJSDocInfo();
       if (ownJsDoc != null && ownJsDoc.isConstructor()) {
-        FunctionTypeI functionType = n.getFirstChild()
-            .getTypeI()
-            .toMaybeFunctionType();
+        TypeI type = n.getFirstChild().getTypeI();
+        if (type == null) {
+          return ConformanceResult.CONFORMANCE;
+        }
+        FunctionTypeI functionType = type.toMaybeFunctionType();
         if (functionType == null) {
           return ConformanceResult.CONFORMANCE;
         }