diff --git a/kernel/arch/armv8/paging.c b/kernel/arch/armv8/paging.c
index a59d818..c6a9461 100644
--- a/kernel/arch/armv8/paging.c
+++ b/kernel/arch/armv8/paging.c
@@ -534,7 +534,7 @@ caps_map_l3(struct capability* dest,
     }
 
     // check offset within frame
-    if ((offset + BASE_PAGE_SIZE > get_size(src)) ||
+    if ((offset + pte_count * BASE_PAGE_SIZE > get_size(src)) ||
         ((offset % BASE_PAGE_SIZE) != 0)) {
         return SYS_ERR_FRAME_OFFSET_INVALID;
     }