diff --git a/LKDBHelper/Helper/LKDBHelper.m b/LKDBHelper/Helper/LKDBHelper.m
index 48391b2..a188775 100644
--- a/LKDBHelper/Helper/LKDBHelper.m
+++ b/LKDBHelper/Helper/LKDBHelper.m
@@ -665,7 +665,7 @@ - (void)fixSqlColumnsWithClass:(Class)clazz tableName:(NSString *)tableName
                 NSString *defaultValue = property.defaultValue ?: @"0";
                 if ([property.sqlColumnType isEqualToString:LKSQL_Type_Text]) {
                     if (LKDBNullIsEmptyString) {
-                        defaultValue = @"";
+                        defaultValue = @"''";
                     } else {
                         defaultValue = @"null";
                     }