diff --git a/src/xenia/gpu/command_processor.cc b/src/xenia/gpu/command_processor.cc
index 7a4ac4e23..bd2bf4de3 100644
--- a/src/xenia/gpu/command_processor.cc
+++ b/src/xenia/gpu/command_processor.cc
@@ -265,6 +265,9 @@ void CommandProcessor::InitializeRingBuffer(uint32_t ptr, uint32_t size_log2) {
   read_ptr_index_ = 0;
   primary_buffer_ptr_ = ptr;
   primary_buffer_size_ = uint32_t(1) << (size_log2 + 3);
+
+  std::memset(kernel_state_->memory()->TranslatePhysical(primary_buffer_ptr_),
+              0, primary_buffer_size_);
 }
 
 void CommandProcessor::EnableReadPointerWriteBack(uint32_t ptr,