diff --git a/sandboxed_api/sandbox2/policybuilder.h b/sandboxed_api/sandbox2/policybuilder.h
index f3765a3..f5297a4 100644
--- a/sandboxed_api/sandbox2/policybuilder.h
+++ b/sandboxed_api/sandbox2/policybuilder.h
@@ -45,6 +45,7 @@ namespace sandbox2 {
 class AllowAllSyscalls;
 class TraceAllSyscalls;
 class UnrestrictedNetworking;
+class LoadUserBpfCodeFromFile;
 
 // PolicyBuilder is a helper class to simplify creation of policies. The builder
 // uses fluent interface for convenience and increased readability of policies.