diff --git a/greetings.go b/greetings.go
index ab4dfa9..e56a36f 100644
--- a/greetings.go
+++ b/greetings.go
@@ -1,9 +1,14 @@
 package greetings
 
 import "fmt"
+import "errors"
 
 // Hello returns a greeting for the named person.
 func Hello(name string) string {
+   // If no name was given, return an error with a message.
+    if name == "" {
+        return "", errors.New("empty name")
+    }
     // Return a greeting that embeds the name in a message.
     message := fmt.Sprintf("Hi, %v. Welcome!", name)
     return message