diff --git a/ntoskrnl/ke/amd64/krnlinit.c b/ntoskrnl/ke/amd64/krnlinit.c
index 234628a3d46..34d1a6621f6 100644
--- a/ntoskrnl/ke/amd64/krnlinit.c
+++ b/ntoskrnl/ke/amd64/krnlinit.c
@@ -292,7 +292,7 @@ KiInitializeKernel(IN PKPROCESS InitProcess,
     PageDirectory[1] = 0;
     KeInitializeProcess(InitProcess,
                         0,
-                        0xFFFFFFFF,
+                        MAXULONG_PTR,
                         PageDirectory,
                         FALSE);
     InitProcess->QuantumReset = MAXCHAR;