diff --git a/source/mir/deser/package.d b/source/mir/deser/package.d
index 438e955..72e2deb 100644
--- a/source/mir/deser/package.d
+++ b/source/mir/deser/package.d
@@ -1360,7 +1360,8 @@ template deserializeValue(string[] symbolTable, TableKind tableKind)
                 return retNull;
             }
         }
-        static if ((contains!(typeof(null)) || contains!IonNull) && T.AllowedTypes.length == 2)
+        static if (T.AllowedTypes.length == 2
+            && (contains!(typeof(null)) || contains!IonNull || is(T.AllowedTypes[0] == void)))
         {
             T.AllowedTypes[1] payload;
             if (auto exception = deserializeValue(data, payload, table, tableIndex))
diff --git a/source/mir/ion/examples.d b/source/mir/ion/examples.d
index 6b3d543..7d4ffc5 100644
--- a/source/mir/ion/examples.d
+++ b/source/mir/ion/examples.d
@@ -1408,7 +1408,7 @@ version(mir_ion_test) unittest
 version(mir_ion_test) unittest
 {
     import mir.serde: serdeEnumProxy;
-    import mir.algebraic: Nullable, nullable;
+    import mir.algebraic: Nullable, Variant, nullable;
 
     @serdeEnumProxy!string
     enum StrE : string
@@ -1420,13 +1420,15 @@ version(mir_ion_test) unittest
     static struct S
     {
         Nullable!(StrE[]) a;
+        Variant!(void, StrE) b;
     }
 
     import mir.ser.json : serializeJson;
     import mir.deser.json : deserializeJson;
 
     auto s = S([StrE.one, StrE.two, cast(StrE)"drei"].nullable);
-    auto str = `{"a":["eins","zwei","drei"]}`;
+    s.b = StrE.two;
+    auto str = `{"a":["eins","zwei","drei"],"b":"zwei"}`;
 
     assert(str.deserializeJson!S == s);
     assert(s.serializeJson == str, str);