diff --git a/include/CL/cl_ext.h b/include/CL/cl_ext.h
index 1a48985e167bf1d227e7f6c4651056148f3a5e51..d6ca6982c90a3cc572ef00272f7986baf7d88197 100644
--- a/include/CL/cl_ext.h
+++ b/include/CL/cl_ext.h
@@ -1077,6 +1077,12 @@ clCreateCommandQueueWithPropertiesKHR(
 #define CL_DEVICE_KERNEL_EXEC_TIMEOUT_NV                    0x4005
 #define CL_DEVICE_INTEGRATED_MEMORY_NV                      0x4006
 
+/* extension to cl_nv_device_attribute_query */
+#define CL_DEVICE_ATTRIBUTE_ASYNC_ENGINE_COUNT_NV           0x4007
+#define CL_DEVICE_PCI_BUS_ID_NV                             0x4008
+#define CL_DEVICE_PCI_SLOT_ID_NV                            0x4009
+#define CL_DEVICE_PCI_DOMAIN_ID_NV                          0x400A
+
 /***************************************************************
 * cl_amd_device_attribute_query
 ***************************************************************/