diff --git a/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.c b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.c
index eefed6ddb1..efa4bbdd14 100644
--- a/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.c
+++ b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.c
@@ -222,7 +222,7 @@ GetMemoryPermissions (
        * 2.8 FFA_MEM_PERM_GET
        */
       *PageCount = SvcArgs.Arg3 + 1;
-      ASSERT (*PageCount > EFI_SIZE_TO_PAGES (Length));
+      ASSERT (*PageCount <= EFI_SIZE_TO_PAGES (Length));
     } else {
       *PageCount = 1;
     }