diff --git a/include/ntapi/nt_sysinfo.h b/include/ntapi/nt_sysinfo.h
index b8266e6..37cf4a1 100644
--- a/include/ntapi/nt_sysinfo.h
+++ b/include/ntapi/nt_sysinfo.h
@@ -13,6 +13,7 @@ typedef enum _nt_system_info_class {
 	NT_SYSTEM_TIME_OF_DAY_INFORMATION 		= 3,
 	NT_SYSTEM_NOT_IMPLEMENTED1 			= 4,
 	NT_SYSTEM_PROCESS_INFORMATION 			= 5,
+	NT_SYSTEM_PROCESS_AND_THREAD_INFORMATION 	= 5,
 	NT_SYSTEM_CALL_COUNTS 				= 6,
 	NT_SYSTEM_DEVICE_INFORMATION 			= 7,
 	NT_SYSTEM_PROCESSOR_TIMES 			= 8,