diff --git a/include/orm/constants_extern.hpp b/include/orm/constants_extern.hpp
index be2938885..f90a609d6 100644
--- a/include/orm/constants_extern.hpp
+++ b/include/orm/constants_extern.hpp
@@ -55,6 +55,7 @@ namespace Orm::Constants
     SHAREDLIB_EXPORT extern const QString text_;
     SHAREDLIB_EXPORT extern const QString Prepared;
     SHAREDLIB_EXPORT extern const QString Unprepared;
+    SHAREDLIB_EXPORT extern const QString null_;
 
     SHAREDLIB_EXPORT extern const QString QMYSQL;
     SHAREDLIB_EXPORT extern const QString QPSQL;
diff --git a/include/orm/constants_inline.hpp b/include/orm/constants_inline.hpp
index 93420a233..9645dae48 100644
--- a/include/orm/constants_inline.hpp
+++ b/include/orm/constants_inline.hpp
@@ -54,6 +54,7 @@ namespace Orm::Constants
     inline const QString text_       = QStringLiteral("text");
     inline const QString Prepared    = QStringLiteral("prepared");
     inline const QString Unprepared  = QStringLiteral("unprepared");
+    inline const QString null_       = QStringLiteral("null");
 
     inline const QString QMYSQL      = QStringLiteral("QMYSQL");
     inline const QString QPSQL       = QStringLiteral("QPSQL");
diff --git a/src/orm/constants_extern.cpp b/src/orm/constants_extern.cpp
index d32fce8f8..2c60b09c5 100644
--- a/src/orm/constants_extern.cpp
+++ b/src/orm/constants_extern.cpp
@@ -44,6 +44,7 @@ namespace Orm::Constants
     const QString text_       = QStringLiteral("text");
     const QString Prepared    = QStringLiteral("prepared");
     const QString Unprepared  = QStringLiteral("unprepared");
+    const QString null_       = QStringLiteral("null");
 
     const QString QMYSQL      = QStringLiteral("QMYSQL");
     const QString QPSQL       = QStringLiteral("QPSQL");