diff --git a/src/xenia/kernel/objects/xthread.cc b/src/xenia/kernel/objects/xthread.cc
index 11e6e7032..f39518956 100644
--- a/src/xenia/kernel/objects/xthread.cc
+++ b/src/xenia/kernel/objects/xthread.cc
@@ -146,7 +146,7 @@ X_STATUS XThread::Create() {
   }
 
   // Set native info.
-  SetNativePointer(thread_state_address_);
+  SetNativePointer(thread_state_address_, true);
 
   XUserModule* module = kernel_state()->GetExecutableModule();
 
diff --git a/src/xenia/kernel/xobject.cc b/src/xenia/kernel/xobject.cc
index 689026d8e..79c155a84 100644
--- a/src/xenia/kernel/xobject.cc
+++ b/src/xenia/kernel/xobject.cc
@@ -152,13 +152,16 @@ X_STATUS XObject::WaitMultiple(uint32_t count, XObject** objects,
   return result;
 }
 
-void XObject::SetNativePointer(uint32_t native_ptr) {
+void XObject::SetNativePointer(uint32_t native_ptr, bool uninitialized) {
   std::lock_guard<std::mutex> lock(kernel_state_->object_mutex());
 
   auto header =
       kernel_state_->memory()->TranslateVirtual<DISPATCH_HEADER*>(native_ptr);
 
-  assert_true(!(header->wait_list_blink & 0x1));
+  // Memory uninitialized, so don't bother with the check.
+  if (!uninitialized) {
+    assert_true(!(header->wait_list_blink & 0x1));
+  }
 
   // Stash pointer in struct.
   uint64_t object_ptr = reinterpret_cast<uint64_t>(this);
diff --git a/src/xenia/kernel/xobject.h b/src/xenia/kernel/xobject.h
index 762acc398..dcfb1f43a 100644
--- a/src/xenia/kernel/xobject.h
+++ b/src/xenia/kernel/xobject.h
@@ -78,7 +78,7 @@ class XObject {
   virtual void* GetWaitHandle() { return 0; }
 
  protected:
-  void SetNativePointer(uint32_t native_ptr);
+  void SetNativePointer(uint32_t native_ptr, bool uninitialized = false);
 
   static uint32_t TimeoutTicksToMs(int64_t timeout_ticks);
 
diff --git a/src/xenia/memory.cc b/src/xenia/memory.cc
index b557ac891..a8bd8ef21 100644
--- a/src/xenia/memory.cc
+++ b/src/xenia/memory.cc
@@ -596,6 +596,10 @@ bool BaseHeap::AllocFixed(uint32_t base_address, uint32_t size,
       XELOGE("BaseHeap::Alloc failed to alloc range from host");
       return false;
     }
+
+    if (FLAGS_scribble_heap && protect & kMemoryProtectWrite) {
+      memset(result, 0xCD, page_count * page_size_);
+    }
   }
 
   // Set page state.
@@ -725,6 +729,10 @@ bool BaseHeap::AllocRange(uint32_t low_address, uint32_t high_address,
       XELOGE("BaseHeap::Alloc failed to alloc range from host");
       return false;
     }
+
+    if (FLAGS_scribble_heap && protect & kMemoryProtectWrite) {
+      memset(result, 0xCD, page_count * page_size_);
+    }
   }
 
   // Set page state.