diff --git a/gen/runtime.cpp b/gen/runtime.cpp
index 20de9871..3a9d73c4 100644
--- a/gen/runtime.cpp
+++ b/gen/runtime.cpp
@@ -936,10 +936,11 @@ static void LLVM_D_BuildRuntimeModule()
         fn->setCallingConv(gABI->callingConv(LINKd));
     }
 
-    // void _d_hidden_func()
+    // void _d_hidden_func(Object o)
     {
         llvm::StringRef fname("_d_hidden_func");
-        LLFunctionType* fty = llvm::FunctionType::get(voidTy, false);
+        LLType *types[] = { voidPtrTy };
+        LLFunctionType* fty = llvm::FunctionType::get(voidTy, types, false);
         llvm::Function::Create(fty, llvm::GlobalValue::ExternalLinkage, fname, M);
     }
 
diff --git a/runtime/druntime b/runtime/druntime
index 9ffca792..4bfde3ea 160000
--- a/runtime/druntime
+++ b/runtime/druntime
@@ -1 +1 @@
-Subproject commit 9ffca792ac1df0322714f4ba42288e5a18575a55
+Subproject commit 4bfde3ea92fc175d1cc037f72335e71563e5bef7