diff --git a/Kernel/Arch/x86/CPU.h b/Kernel/Arch/x86/CPU.h
index 08c1bfac52..32c1bde4f2 100644
--- a/Kernel/Arch/x86/CPU.h
+++ b/Kernel/Arch/x86/CPU.h
@@ -14,7 +14,6 @@
 #define READONLY_AFTER_INIT __attribute__((section(".ro_after_init")))
 #define UNMAP_AFTER_INIT NEVER_INLINE __attribute__((section(".unmap_after_init")))
 
-#define PAGE_SIZE 4096
 /* Map IRQ0-15 @ ISR 0x50-0x5F */
 #define IRQ_VECTOR_BASE 0x50
 #define GENERIC_INTERRUPT_HANDLERS_COUNT (256 - IRQ_VECTOR_BASE)
diff --git a/Kernel/Heap/kmalloc.h b/Kernel/Heap/kmalloc.h
index 624758ea53..c9db2b9285 100644
--- a/Kernel/Heap/kmalloc.h
+++ b/Kernel/Heap/kmalloc.h
@@ -8,6 +8,7 @@
 
 #include <AK/Types.h>
 #include <Kernel/Debug.h>
+#include <LibC/limits.h>
 
 #define KMALLOC_SCRUB_BYTE 0xbb
 #define KFREE_SCRUB_BYTE 0xaa