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.