diff --git a/src/core/credential_format/mod.rs b/src/core/credential_format/mod.rs
index a206357..1d55fde 100644
--- a/src/core/credential_format/mod.rs
+++ b/src/core/credential_format/mod.rs
@@ -292,6 +292,6 @@ impl From<&CredentialType> for String {
 
 impl std::fmt::Display for &CredentialType {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self)
+        write!(f, "{}", String::from(*self))
     }
 }