diff --git a/arch/x86/kernel/eisa.c b/arch/x86/kernel/eisa.c
index 881f9236ebff..f260e452e4f8 100644
--- a/arch/x86/kernel/eisa.c
+++ b/arch/x86/kernel/eisa.c
@@ -5,6 +5,7 @@
  */
 #include <linux/ioport.h>
 #include <linux/eisa.h>
+#include <linux/io.h>
 
 static __init int eisa_bus_probe(void)
 {