diff --git a/exercises/structs/structs3.rs b/exercises/structs/structs3.rs
index e84f2ebc..e5666e21 100644
--- a/exercises/structs/structs3.rs
+++ b/exercises/structs/structs3.rs
@@ -16,7 +16,7 @@ struct Package {
 impl Package {
     fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package {
         if weight_in_grams <= 0 {
-            // panic statement goes here...
+            panic!("Can not ship a weightless package.")
         } else {
             Package {
                 sender_country,