diff --git a/kernel/src/acpi/RSDT.cpp b/kernel/src/acpi/RSDT.cpp
index 52ffaec7..55629461 100644
--- a/kernel/src/acpi/RSDT.cpp
+++ b/kernel/src/acpi/RSDT.cpp
@@ -4,6 +4,7 @@
 #include "bootboot.h"
 #include "log/Log.h"
 #include "memory/MemoryManager.h"
+#include "misc/utils.h"
 #include "std/stdio.h"
 #include "std/string.h"
 
@@ -21,7 +22,7 @@ ACPI::SDTHeader* ACPI::get_rsdt_or_xsdt()
     cache = (SDTHeader*)MemoryManager::get_unaligned_mapping(physical);
 
     uint64_t offset = (uint64_t)physical % PAGE_SIZE;
-    uint64_t rsdt_pages = (offset + cache->Length) / PAGE_SIZE;
+    uint64_t rsdt_pages = Utilities::get_blocks_from_size(PAGE_SIZE, (offset + cache->Length));
 
     if (rsdt_pages > 1)
     {