diff --git a/source/video_core/src/video_core/command_processor.h b/source/video_core/src/video_core/command_processor.h
index a6c05e7..dac1fc4 100644
--- a/source/video_core/src/video_core/command_processor.h
+++ b/source/video_core/src/video_core/command_processor.h
@@ -23,7 +23,7 @@ union CommandHeader {
     // fourth bit: 0xFF000000
     BitFieldLegacy<16,  4, u32> parameter_mask;
 
-    BitFieldLegacy<20, 11, u32> extra_data_length;
+    BitFieldLegacy<20,  8, u32> extra_data_length;
 
     BitFieldLegacy<31,  1, u32> group_commands;
 };