diff --git a/arch/powerpc/platforms/powermac/backlight.c b/arch/powerpc/platforms/powermac/backlight.c
index 79741370c40c..1796327955c6 100644
--- a/arch/powerpc/platforms/powermac/backlight.c
+++ b/arch/powerpc/platforms/powermac/backlight.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/backlight.h>
 #include <linux/adb.h>
+#include <linux/of.h>
 #include <linux/pmu.h>
 #include <linux/atomic.h>
 #include <linux/export.h>