diff --git a/k32testing.py b/k32testing.py
index 18efd0f..4eed467 100644
--- a/k32testing.py
+++ b/k32testing.py
@@ -374,6 +374,11 @@ def DeviceIoControl(hDevice, dwIoControlCode, lpInBuffer, nInBufferSize=None, lp
 def NtWow64ReadVirtualMemory64(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead=None):
     return NtWow64ReadVirtualMemory64.ctypes_function(hProcess, lpBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead)
 
+@NtdllProxy('NtQuerySystemInformation')
+def NtQuerySystemInformation(SystemInformationClass, SystemInformation=None, SystemInformationLength=0, ReturnLength=NeededParameter):
+    if SystemInformation is not None and SystemInformation == 0:
+        SystemInformationLength = ctypes.sizeof(SystemInformation)
+    return NtQuerySystemInformation.ctypes_function(SystemInformationClass, SystemInformation, SystemInformationLength, ReturnLength)
 
 ###### ADVAPI32 ########