diff --git a/src/add-ons/kernel/bus_managers/isa/i386_io.h b/src/add-ons/kernel/bus_managers/isa/i386_io.h
deleted file mode 100644
index 6fc5199ad1..0000000000
--- a/src/add-ons/kernel/bus_managers/isa/i386_io.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#ifndef _I386_IO_H
-#define _I386_IO_H
-
-#define out8(value,port) \
-__asm__ ("outb %%al,%%dx"::"a" (value),"d" (port))
-
-#define out16(value,port) \
-__asm__ ("outw %%ax,%%dx"::"a" (value),"d" (port))
-
-#define out32(value,port) \
-__asm__ ("outl %%eax,%%dx"::"a" (value),"d" (port))
-
-#define in8(port) ({ \
-unsigned char _v; \
-__asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port)); \
-_v; \
-})
-
-#define in16(port) ({ \
-unsigned short _v; \
-__asm__ volatile ("inw %%dx,%%ax":"=a" (_v):"d" (port)); \
-_v; \
-})
-
-#define in32(port) ({ \
-unsigned int _v; \
-__asm__ volatile ("inl %%dx,%%eax":"=a" (_v):"d" (port)); \
-_v; \
-})
-
-#endif