diff --git a/src/add-ons/kernel/drivers/audio/hda/hda_controller_defs.h b/src/add-ons/kernel/drivers/audio/hda/hda_controller_defs.h
index 73bb852273..1fbca3f87b 100644
--- a/src/add-ons/kernel/drivers/audio/hda/hda_controller_defs.h
+++ b/src/add-ons/kernel/drivers/audio/hda/hda_controller_defs.h
@@ -138,12 +138,18 @@
 #define ATI_HDA_MISC_CNTR2			0x42
 #define ATI_HDA_MISC_CNTR2_MASK   		0xf8
 #define ATI_HDA_ENABLE_SNOOP      		0x02
+#define NVIDIA_HDA_OSTRM_COH			0x4c
+#define NVIDIA_HDA_ISTRM_COH			0x4d
+#define NVIDIA_HDA_ENABLE_COHBIT		0x01
 #define NVIDIA_HDA_TRANSREG			0x4e
 #define NVIDIA_HDA_TRANSREG_MASK		0xf0
 #define NVIDIA_HDA_ENABLE_COHBITS		0x0f
+#define INTEL_SCH_HDA_DEVC			0x78
+#define INTEL_SCH_HDA_DEVC_SNOOP		0x800
 
 #define ATI_VENDORID		0x1002
 #define INTEL_VENDORID		0x8086
+#define INTEL_SCH_DEVICEID	0x811b
 #define NVIDIA_VENDORID		0x10de