diff --git a/android/sdk_version.go b/android/sdk_version.go
index d73c912..8953eae 100644
--- a/android/sdk_version.go
+++ b/android/sdk_version.go
@@ -51,6 +51,7 @@
 	SdkModule
 	SdkSystemServer
 	SdkPrivate
+	SdkToolchain // API surface provided by ART to compile other API domains
 )
 
 // String returns the string representation of this SdkKind
@@ -76,6 +77,8 @@
 		return "module-lib"
 	case SdkSystemServer:
 		return "system-server"
+	case SdkToolchain:
+		return "toolchain"
 	default:
 		return "invalid"
 	}