diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 7d8aed524..6d4e376b8 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -19255,7 +19255,7 @@ interface BlobCallback {
 }
 
 interface CustomElementConstructor {
-    (): HTMLElement;
+    new (): HTMLElement;
 }
 
 interface DecodeErrorCallback {
diff --git a/inputfiles/overridingTypes.json b/inputfiles/overridingTypes.json
index f29ef621e..5f6279ba9 100644
--- a/inputfiles/overridingTypes.json
+++ b/inputfiles/overridingTypes.json
@@ -311,6 +311,11 @@
                 "override-signatures": [
                     "(chunk: I, controller: TransformStreamDefaultController<O>): void | PromiseLike<void>"
                 ]
+            },
+            "CustomElementConstructor": {
+                "override-signatures": [
+                    "new (): HTMLElement"
+                ]
             }
         }
     },