diff --git a/headers/private/graphics/nvidia/nv_acc.h b/headers/private/graphics/nvidia/nv_acc.h
index 49581fec42..8896afada1 100644
--- a/headers/private/graphics/nvidia/nv_acc.h
+++ b/headers/private/graphics/nvidia/nv_acc.h
@@ -283,6 +283,7 @@ typedef struct {
 
 /************ DMA command defines ***********/
 
+/* FIFO channels */
 #define NV_GENERAL_FIFO_CH0					0x0000
 #define NV_GENERAL_FIFO_CH1					0x2000
 #define NV_GENERAL_FIFO_CH2					0x4000
@@ -291,7 +292,8 @@ typedef struct {
 #define NV_GENERAL_FIFO_CH5					0xa000
 #define NV_GENERAL_FIFO_CH6					0xc000
 #define NV_GENERAL_FIFO_CH7					0xe000
-#define NV_GENERAL_CMDHANDLE				0x0000
+
+/* sub-command offsets within FIFO channels */
 #define NV_GENERAL_DMAPUT					0x0040
 #define NV_GENERAL_DMAGET					0x0044
 #define NV_ROP5_SOLID_SETROP5				0x0300