diff --git a/src/node_url.cc b/src/node_url.cc
index f5b1a143f1bad5..001475b04c9f7a 100644
--- a/src/node_url.cc
+++ b/src/node_url.cc
@@ -129,12 +129,12 @@ namespace url {
 #else
   // Intentional non-ops if ICU is not present.
   static int ToUnicode(std::string* input, std::string* output) {
-    output->reserve(input.length());
+    output->reserve(input->length());
     *output = input->c_str();
   }
 
   static int ToASCII(std::string* input, std::string* output) {
-    output->reserve(input.length());
+    output->reserve(input->length());
     *output = input->c_str();
   }