diff --git a/src/xenia/apu/xma_context.h b/src/xenia/apu/xma_context.h
index 68be68c73..f442bf5f1 100644
--- a/src/xenia/apu/xma_context.h
+++ b/src/xenia/apu/xma_context.h
@@ -65,8 +65,8 @@ struct XMA_CONTEXT_DATA {
   uint32_t loop_subframe_end : 3;             // +14bit, XMASetLoopData
   uint32_t loop_subframe_skip : 3;            // +17bit, XMASetLoopData might be
                                               // subframe_decode_count
-  uint32_t subframe_decode_count : 4;  // +20bit might be subframe_skip_count
-  uint32_t unk_dword_1_b : 3;          // ? NumSubframesToSkip/NumChannels(?)
+  uint32_t subframe_decode_count : 4;  // +20bit
+  uint32_t subframe_skip_count : 3;    // +24bit
   uint32_t sample_rate : 2;            // +27bit enum of sample rates
   uint32_t is_stereo : 1;              // +29bit
   uint32_t unk_dword_1_c : 1;          // +30bit
@@ -99,7 +99,9 @@ struct XMA_CONTEXT_DATA {
   // DWORD 9
   // +0bit, XMAGetOutputBufferReadOffset AKA WriteBufferOffsetRead
   uint32_t output_buffer_read_offset : 5;
-  uint32_t unk_dword_9 : 27;  // StopWhenDone/InterruptWhenDone(?)
+  uint32_t : 25;
+  uint32_t stop_when_done : 1;       // +30bit
+  uint32_t interrupt_when_done : 1;  // +31bit
 
   // DWORD 10-15
   uint32_t unk_dwords_10_15[6];  // reserved?