diff --git a/dom/base/URL.cpp b/dom/base/URL.cpp
index 585dda68502e..13f1c1d71bec 100644
--- a/dom/base/URL.cpp
+++ b/dom/base/URL.cpp
@@ -231,7 +231,7 @@ URL::SetHref(const nsAString& aHref, ErrorResult& aRv)
     return;
   }
 
-  aRv = mURI->SetSpec(href);
+  mURI = uri;
   UpdateURLSearchParams();
 }