diff --git a/src/node_url.cc b/src/node_url.cc
index a5ed89fa84eb78..6a96a9e3fa2bea 100644
--- a/src/node_url.cc
+++ b/src/node_url.cc
@@ -110,11 +110,13 @@ class URLHost {
   // These helpers are the easiest solution but we might want to consider
   // just not forcing strings into an union.
   inline void SetOpaque(std::string&& string) {
+    Reset();
     type_ = HostType::H_OPAQUE;
     new(&value_.opaque) std::string(std::move(string));
   }
 
   inline void SetDomain(std::string&& string) {
+    Reset();
     type_ = HostType::H_DOMAIN;
     new(&value_.domain) std::string(std::move(string));
   }