diff --git a/radio/1.0/vts/SapCallback.vts b/radio/1.0/vts/SapCallback.vts
index 2e61ce6..3a33dba 100644
--- a/radio/1.0/vts/SapCallback.vts
+++ b/radio/1.0/vts/SapCallback.vts
@@ -5,6 +5,7 @@
 package: "android.hardware.radio"
 
 import: "android.hardware.radio@1.0::types"
+import: "android.hidl.base@1.0::types"
 
 interface: {
     api: {