diff --git a/src/sqlgeneratorbase.cpp b/src/sqlgeneratorbase.cpp
index 4876d0f..fa1c0cb 100644
--- a/src/sqlgeneratorbase.cpp
+++ b/src/sqlgeneratorbase.cpp
@@ -73,7 +73,7 @@ QString SqlGeneratorBase::saveRecord(Table *t, QString tableName)
 
 QString SqlGeneratorBase::fieldDeclare(FieldModel *field)
 {
-    return field->name + " " + fieldType(field);
+    return field->name + " " + fieldType(field) + (field->notNull ? " NOT NULL" : "");
 }
 
 QStringList SqlGeneratorBase::diff(DatabaseModel lastModel,
diff --git a/src/tablemodel.cpp b/src/tablemodel.cpp
index 3ce6242..7e3758a 100644
--- a/src/tablemodel.cpp
+++ b/src/tablemodel.cpp
@@ -225,7 +225,7 @@ TableModel::TableModel(int typeId, QString tableName)
             if(propName == __nut_LEN)
                 f->length = value.toInt();
             else if(propName == __nut_NOT_NULL)
-                f->notNull = false;
+                f->notNull = true;
             else if(propName == __nut_DEFAULT_VALUE)
                 f->defaultValue = value;
             else if(propName == __nut_PRIMARY_KEY)