diff --git a/dm-std-lib/src/lib.rs b/dm-std-lib/src/lib.rs
index f7e2fc2..f5aa64f 100644
--- a/dm-std-lib/src/lib.rs
+++ b/dm-std-lib/src/lib.rs
@@ -23,7 +23,7 @@ impl StdCoreError {
 
 impl Debug for StdCoreError {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
-        todo!()
+        write!(f, "{}", self.message)
     }
 }