diff --git a/apps/develop/gen/gen.go b/apps/develop/gen/gen.go
index a0761f3..870819d 100644
--- a/apps/develop/gen/gen.go
+++ b/apps/develop/gen/gen.go
@@ -110,7 +110,7 @@ func (s *toolsGenTableColumn) CheckTypeColumn(columnName string) bool {
 
 func (s *toolsGenTableColumn) CheckSexColumn(columnName string) bool {
 	if len(columnName) >= 3 {
-		tmp := columnName[len(columnName)-4:]
+		tmp := columnName[len(columnName)-3:]
 		return tmp == "sex"
 	}
 	return false