diff --git a/headers/private/kernel/arch/x86/arch_cpu.h b/headers/private/kernel/arch/x86/arch_cpu.h
index c313f662c6..652a95a796 100644
--- a/headers/private/kernel/arch/x86/arch_cpu.h
+++ b/headers/private/kernel/arch/x86/arch_cpu.h
@@ -11,11 +11,6 @@
 
 #define PAGE_SIZE 4096
 
-#define _BIG_ENDIAN 0
-#define _LITTLE_ENDIAN 1
-
-#define FUNCTION_CALL_PARAMETER_ALIGNMENT_TYPE	uint32
-
 struct tss {
 	uint16 prev_task;
 	uint16 unused0;