diff --git a/VKernel/Kernel/intr/gdt.vp b/VKernel/Kernel/intr/gdt.vp
index b3bebfd..193ff99 100644
--- a/VKernel/Kernel/intr/gdt.vp
+++ b/VKernel/Kernel/intr/gdt.vp
@@ -132,7 +132,7 @@ def setTSS64(num: int, base: uint64, limit: uint32):
     gdt[num].base_low    = base & 0xFFFF
     gdt[num].base_middle = (base >> 16) & 0xFF
     gdt[num].access      = 0x89
-    gdt[num].granularity = 0x00
+    gdt[num].granularity = (limit >> 16) & 0x0F
     gdt[num].base_high   = (base >> 24) & 0xFF
     gdt[num + 1].limit_low = (base >> 32) & 0xFFFF
     gdt[num + 1].base_low  = (base >> 48) & 0xFFFF