diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index efc4098..8a21791 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -15,6 +15,7 @@
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */
+#include <linux/config.h>
 #include <linux/types.h>
 #include <linux/proc_fs.h>
 #include <asm/atomic.h>