diff --git a/neuralnetworks/1.2/Android.bp b/neuralnetworks/1.2/Android.bp
index 0642dceb2e..daf0c18e0f 100644
--- a/neuralnetworks/1.2/Android.bp
+++ b/neuralnetworks/1.2/Android.bp
@@ -24,6 +24,7 @@ hidl_interface {
     types: [
         "Constant",
         "DeviceType",
+        "Extension",
         "FmqRequestDatum",
         "FmqResultDatum",
         "MeasureTiming",