diff --git a/include/asm-ppc/pmac_feature.h b/include/asm-ppc/pmac_feature.h
index 8beb162873f4d07fc331b0319baf649f5c685a36..e9683bcff19bcec68c3b5ab16d9ee50f18299bd4 100644
--- a/include/asm-ppc/pmac_feature.h
+++ b/include/asm-ppc/pmac_feature.h
@@ -32,6 +32,7 @@
 #define __PPC_ASM_PMAC_FEATURE_H
 
 #include <asm/macio.h>
+#include <asm/machdep.h>
 
 /*
  * Known Mac motherboard models