diff --git a/src/ser.rs b/src/ser.rs
index afae668..9a4d514 100644
--- a/src/ser.rs
+++ b/src/ser.rs
@@ -602,7 +602,7 @@ where
             "__hematite_nbt_i8_array__" => self.write_header(0x07)?,
             "__hematite_nbt_i32_array__" => self.write_header(0x0b)?,
             "__hematite_nbt_i64_array__" => self.write_header(0x0c)?,
-            _ => return Err(Error::UnrepresentableType(stringify!(tuple_struct))),
+            _ => return Err(Error::UnrepresentableType("tuple struct")),
         }
 
         Ok(NoOp)