diff --git a/engine.go b/engine.go
index b47fda89..0e063da5 100644
--- a/engine.go
+++ b/engine.go
@@ -933,7 +933,7 @@ func (engine *Engine) mapType(v reflect.Value) *core.Table {
 
 		table.AddColumn(col)
 
-		if fieldType.Kind() == reflect.Int64 && (col.FieldName == "Id" || strings.HasSuffix(col.FieldName, ".Id")) {
+		if fieldType.Kind() == reflect.Int64 && (strings.ToUpper(col.FieldName) == "ID" || strings.HasSuffix(strings.ToUpper(col.FieldName), ".ID")) {
 			idFieldColName = col.Name
 		}
 	} // end for