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;
 };
diff --git a/tests/safeunion/1.0/Android.bp b/tests/safeunion/1.0/Android.bp
index ede8401..87edd53 100644
--- a/tests/safeunion/1.0/Android.bp
+++ b/tests/safeunion/1.0/Android.bp
@@ -9,6 +9,7 @@
     ],
     interfaces: [
         "android.hidl.base@1.0",
+        "android.hidl.safe_union@1.0",
     ],
     gen_java: true,
 }
diff --git a/tests/safeunion/1.0/ISafeUnion.hal b/tests/safeunion/1.0/ISafeUnion.hal
index f48248b..58c08c6 100644
--- a/tests/safeunion/1.0/ISafeUnion.hal
+++ b/tests/safeunion/1.0/ISafeUnion.hal
@@ -18,6 +18,8 @@
 
 import IOtherInterface;
 
+import android.hidl.safe_union@1.0::Monostate;
+
 interface ISafeUnion {
 
     enum BitField : uint8_t {
@@ -33,14 +35,15 @@
         string j3;
     };
 
-    safe_union EmptySafeUnion {
-    };
-
     safe_union SmallSafeUnion {
+        Monostate noinit;
+
         uint8_t a;
     };
 
     safe_union LargeSafeUnion {
+        Monostate noinit;
+
         int8_t a;
         uint16_t b;
         int32_t c;
@@ -66,6 +69,8 @@
     };
 
     safe_union InterfaceTypeSafeUnion {
+        Monostate noinit;
+
         uint32_t a;
         int8_t[7] b;
         IOtherInterface c;
@@ -76,6 +81,8 @@
     };
 
     safe_union HandleTypeSafeUnion {
+        Monostate noinit;
+
         handle a;
         handle[5] b;
         vec<handle> c;