diff --git a/javalib/api/test-current.txt b/javalib/api/test-current.txt
index 34837a3..958005f 100644
--- a/javalib/api/test-current.txt
+++ b/javalib/api/test-current.txt
@@ -7,7 +7,7 @@
   }
 
   public final class VirtualMachineConfig {
-    method @FlaggedApi("RELEASE_AVF_ENABLE_VENDOR_MODULES") @NonNull public String getOs();
+    method @FlaggedApi("RELEASE_AVF_ENABLE_VENDOR_MODULES") @Nullable public String getOs();
     method @Nullable public String getPayloadConfigPath();
     method public boolean isVmConsoleInputSupported();
   }