diff --git a/lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php b/lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php
index fc84dcafc4688..4831c60d6b9d4 100644
--- a/lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php
+++ b/lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php
@@ -3595,7 +3595,7 @@ public function getIndexName($tableName, $fields, $indexType = '')
             default:
                 $prefix = 'idx_';
         }
-        return strtoupper(ExpressionConverter::shortenEntityName($tableName . '_' . $fields, $prefix));
+        return strtoupper(ExpressionConverter::shortenEntityName($tableName . '_' . $fields . substr("_" . $prefix, 0, -1), $prefix));
     }
 
     /**