diff --git a/src/main/java/com/google/devtools/build/skydoc/fakebuildapi/apple/FakeAppleCommon.java b/src/main/java/com/google/devtools/build/skydoc/fakebuildapi/apple/FakeAppleCommon.java
index 99274946454674..3156380692d5e2 100644
--- a/src/main/java/com/google/devtools/build/skydoc/fakebuildapi/apple/FakeAppleCommon.java
+++ b/src/main/java/com/google/devtools/build/skydoc/fakebuildapi/apple/FakeAppleCommon.java
@@ -67,7 +67,16 @@ public StructApi getPlatformTypeStruct() {
 
   @Override
   public StructApi getPlatformStruct() {
-    return new FakeStructApi();
+    return new FakeStructApi(
+        new ImmutableMap.Builder<String, Object>()
+            .put("ios_device", "ios_device")
+            .put("ios_simulator", "ios_simulator")
+            .put("macos", "macos")
+            .put("tvos_device", "tvos_device")
+            .put("tvos_simulator", "tvos_simulator")
+            .put("watchos_device", "watchos_device")
+            .put("watchos_simulator", "watchos_simulator")
+        .build());
   }
 
   @Override