diff --git a/internal/definitions/interface.go b/internal/definitions/interface.go
index cef2e09..97e1de9 100644
--- a/internal/definitions/interface.go
+++ b/internal/definitions/interface.go
@@ -5,7 +5,7 @@ import (
 )
 
 type Interface struct {
-	Alias             string                  `json:"alias" validate:"min=0,max=3"`
+	Alias             string                  `json:"alias,omitempty" validate:"min=0,max=3"`
 	Type              InterfaceType           `json:"type" validate:"min=0,max=3"`
 	AddressingMode    InterfaceAddressingMode `json:"addressing_mode" validate:"min=0,max=2"`
 	Address           *IPNet                  `json:"address,omitempty" validate:"excluded_unless=AddressingMode 1"`