diff --git a/client/cli/src/lib.rs b/client/cli/src/lib.rs
index 93a25baf6bbd9..1e8d40cb0f8c6 100644
--- a/client/cli/src/lib.rs
+++ b/client/cli/src/lib.rs
@@ -760,7 +760,7 @@ fn fill_config_keystore_in_memory<C, G, E>(config: &mut sc_service::Configuratio
 {
 	match &mut config.keystore {
 		cfg @ KeystoreConfig::None => { *cfg = KeystoreConfig::InMemory; Ok(()) },
-		_ => Err(format!("Keystore config specified when it should not be!")),
+		_ => Err("Keystore config specified when it should not be!".into()),
 	}
 }