diff --git a/modules/config/login.go b/modules/config/login.go
index 3cd1adb7..ec037590 100644
--- a/modules/config/login.go
+++ b/modules/config/login.go
@@ -240,11 +240,14 @@ func DeleteLogin(name string) error {
 		}
 
 		isOAuth := config.Logins[idx].IsOAuth()
+		// Use the stored login name, not the CLI-provided one: the lookup above
+		// is case-insensitive, but credstore keys are exact-match.
+		storedName := config.Logins[idx].Name
 		config.Logins = append(config.Logins[:idx], config.Logins[idx+1:]...)
 
 		// Clean up credstore tokens for OAuth logins
 		if isOAuth {
-			_ = DeleteOAuthToken(name)
+			_ = DeleteOAuthToken(storedName)
 		}
 
 		return saveConfigUnsafe()