diff --git a/include/asm-i386/io_apic.h b/include/asm-i386/io_apic.h
index 059a9ff28b4d..340764076d5f 100644
--- a/include/asm-i386/io_apic.h
+++ b/include/asm-i386/io_apic.h
@@ -3,6 +3,7 @@
 
 #include <asm/types.h>
 #include <asm/mpspec.h>
+#include <asm/apicdef.h>
 
 /*
  * Intel IO-APIC support for SMP and UP systems.
diff --git a/include/asm-x86_64/io_apic.h b/include/asm-x86_64/io_apic.h
index f4fb238c89f1..969d225a9350 100644
--- a/include/asm-x86_64/io_apic.h
+++ b/include/asm-x86_64/io_apic.h
@@ -3,6 +3,7 @@
 
 #include <asm/types.h>
 #include <asm/mpspec.h>
+#include <asm/apicdef.h>
 
 /*
  * Intel IO-APIC support for SMP and UP systems.