diff --git a/cmd/mtaBuild_generated.go b/cmd/mtaBuild_generated.go
index 3a133264d..8e6a19123 100644
--- a/cmd/mtaBuild_generated.go
+++ b/cmd/mtaBuild_generated.go
@@ -173,7 +173,7 @@ func mtaBuildMetadata() config.StepData {
 						Scope:       []string{"PARAMETERS", "STAGES", "STEPS"},
 						Type:        "string",
 						Mandatory:   false,
-						Aliases:     []config.Alias{},
+						Aliases:     []config.Alias{{Name: "extension"}},
 					},
 					{
 						Name:        "platform",
diff --git a/resources/metadata/mtaBuild.yaml b/resources/metadata/mtaBuild.yaml
index 8309aadb0..b77369d36 100644
--- a/resources/metadata/mtaBuild.yaml
+++ b/resources/metadata/mtaBuild.yaml
@@ -58,6 +58,8 @@ spec:
         - STEPS
         mandatory: false
         default:
+        aliases:
+          - name: extension
       - name: platform
         type: string
         description: "mtaBuildTool 'cloudMbt' only: The target platform to which the mtar can be deployed."