diff --git a/crypto/transcript/src/merlin.rs b/crypto/transcript/src/merlin.rs
index 79f50858..c42eee46 100644
--- a/crypto/transcript/src/merlin.rs
+++ b/crypto/transcript/src/merlin.rs
@@ -6,8 +6,8 @@ use crate::Transcript;
 pub struct MerlinTranscript(pub merlin::Transcript);
 // Merlin doesn't implement Debug so provide a stub which won't panic
 impl Debug for MerlinTranscript {
-  fn fmt(&self, _: &mut Formatter<'_>) -> Result<(), core::fmt::Error> {
-    Ok(())
+  fn fmt(&self, fmt: &mut Formatter<'_>) -> Result<(), core::fmt::Error> {
+    fmt.debug_struct("MerlinTranscript").finish()
   }
 }