diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c b/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c
index f967a64788..b7d23c6f32 100644
--- a/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c
+++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c
@@ -558,7 +558,7 @@ ArmClearMemoryRegionReadOnly (
   return SetMemoryRegionAttribute (
            BaseAddress,
            Length,
-           TT_AP_NO_RO,
+           TT_AP_RW_RW,
            ~(TT_ADDRESS_MASK_BLOCK_ENTRY | TT_AP_MASK));
 }