diff --git a/include/asm-i386/io_apic.h b/include/asm-i386/io_apic.h
index 059a9ff28b4d03b66fff8a2aff97ba962d14ceb4..340764076d5f4e56585779eaafb4ba249269f0a4 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 f4fb238c89f14212f84b51a9258fc5960a69a46d..969d225a93502bff46ec0ad92f9ce64143f1ebf1 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.