diff --git a/reactos/ntoskrnl/config/ntapi.c b/reactos/ntoskrnl/config/ntapi.c
index bc89d22c4d7..d70eec131e4 100644
--- a/reactos/ntoskrnl/config/ntapi.c
+++ b/reactos/ntoskrnl/config/ntapi.c
@@ -625,8 +625,8 @@ NtSetValueKey(IN HANDLE KeyHandle,
 
     PreviousMode = ExGetPreviousMode();
 
-    if (Data && !DataSize)
-        return STATUS_INVALID_PARAMETER;
+    if (!DataSize)
+        Data = NULL;
 
     /* Probe and copy the data */
     if ((PreviousMode != KernelMode) && Data)