diff --git a/command.go b/command.go
index 0f4511f3..eca65809 100644
--- a/command.go
+++ b/command.go
@@ -861,10 +861,10 @@ func (c *Command) execute(a []string) (err error) {
 	}
 
 	if err := c.validateRequiredFlags(); err != nil {
-		return err
+		return c.FlagErrorFunc()(c, err)
 	}
 	if err := c.validateFlagGroups(); err != nil {
-		return err
+		return c.FlagErrorFunc()(c, err)
 	}
 
 	if c.RunE != nil {