diff --git a/server/src/construct.rs b/server/src/construct.rs
index 80b4d7bb..f464d39c 100644
--- a/server/src/construct.rs
+++ b/server/src/construct.rs
@@ -271,8 +271,11 @@ impl Construct {
         self
     }
 
-    pub fn new_name(self, name: String) -> Construct {
-        self.named(&name)
+    pub fn new_name(self, name: String) -> Result<Construct, Error> {
+        if name.len() > 20 {
+            return Err(err_msg("20 character name maximum"));
+        }
+        Ok(self.named(&name))
     }
 
     pub fn learn(mut self, s: Skill) -> Construct {
diff --git a/server/src/mtx.rs b/server/src/mtx.rs
index 3352d100..f32f9339 100644
--- a/server/src/mtx.rs
+++ b/server/src/mtx.rs
@@ -152,7 +152,7 @@ pub fn apply(tx: &mut Transaction, account: &Account, variant: MtxVariant, const
     account::debit(tx, account.id, cost)?;
 
     construct = match mtx.variant {
-        MtxVariant::Rename => construct.new_name(name),
+        MtxVariant::Rename => construct.new_name(name)?,
         _ => construct.new_img(),
     };