diff --git a/src/node_os.cc b/src/node_os.cc
index e0ea7e7b828518..c9eef808b0addf 100644
--- a/src/node_os.cc
+++ b/src/node_os.cc
@@ -257,15 +257,13 @@ static void GetInterfaceAddresses(const FunctionCallbackInfo<Value>& args) {
   for (i = 0; i < count; i++) {
     const char* const raw_name = interfaces[i].name;
 
-    // On Windows, the interface name is the UTF8-encoded friendly name and may
-    // contain non-ASCII characters.  On UNIX, it's just a binary string with
-    // no particular encoding but we treat it as a one-byte Latin-1 string.
-#ifdef _WIN32
+    // Use UTF-8 on both Windows and Unixes (While it may be true that UNIX
+    // systems are somewhat encoding-agnostic here, it’s more than reasonable
+    // to assume UTF8 as the default as well. It’s what people will expect if
+    // they name the interface from any input that uses UTF-8, which should be
+    // the most frequent case by far these days.)
     name = String::NewFromUtf8(env->isolate(), raw_name,
         v8::NewStringType::kNormal).ToLocalChecked();
-#else
-    name = OneByteString(env->isolate(), raw_name);
-#endif
 
     if (ret->Has(env->context(), name).FromJust()) {
       ifarr = Local<Array>::Cast(ret->Get(name));