diff --git a/radio/1.3/Android.bp b/radio/1.3/Android.bp
index 6a9b1d0..b6610e0 100644
--- a/radio/1.3/Android.bp
+++ b/radio/1.3/Android.bp
@@ -17,6 +17,7 @@
         "android.hardware.radio@1.1",
         "android.hardware.radio@1.2",
         "android.hidl.base@1.0",
+        "android.hidl.safe_union@1.0",
     ],
     types: [
         "AccessNetwork",
diff --git a/radio/1.3/types.hal b/radio/1.3/types.hal
index a41f4b2..9f0cc15 100644
--- a/radio/1.3/types.hal
+++ b/radio/1.3/types.hal
@@ -26,6 +26,8 @@
 import @1.2::CellIdentity;
 import @1.2::DataRegStateResult;
 
+import android.hidl.safe_union@1.0::Monostate;
+
 enum AccessNetwork : @1.2::AccessNetwork {
     /**
      * Unknown access network
@@ -162,6 +164,8 @@
      * will be empty when device is camped only on 2G/3G .
      */
     safe_union VopsInfo {
+        Monostate noinit;
+
         LteVopsInfo lteVopsInfo; // LTE network capability
     } vopsInfo;
 };