diff --git a/kernel-src/include/x86-64/arch/mmu.h b/kernel-src/include/x86-64/arch/mmu.h
new file mode 100644
index 00000000..0b44e924
--- /dev/null
+++ b/kernel-src/include/x86-64/arch/mmu.h
@@ -0,0 +1,6 @@
+#ifndef _MMU_H_INCLUDE
+#define _MMU_H_INCLUDE
+
+#define PAGE_SIZE 4096
+
+#endif
diff --git a/kernel-src/mm/pmm.c b/kernel-src/mm/pmm.c
index ddb21316..5a5ac449 100644
--- a/kernel-src/mm/pmm.c
+++ b/kernel-src/mm/pmm.c
@@ -2,6 +2,7 @@
 #include <limine.h>
 #include <logging.h>
 #include <string.h>
+#include <arch/mmu.h>
 
 uintptr_t hhdmbase;
 static size_t memorysize;
@@ -17,9 +18,6 @@ static bmsection_t bmsections[PMM_SECTION_COUNT];
 
 static uint64_t *bitmap;
 
-// TODO move to arch specific header
-#define PAGE_SIZE 4096
-
 static volatile struct limine_hhdm_request hhdmreq = {
 	.id = LIMINE_HHDM_REQUEST,
 	.revision = 0