1 files changed, 2 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/powermac/backlight.c b/arch/powerpc/platforms/powermac/backlight.c
index d66415491055..afa593a8544a 100644
--- a/arch/powerpc/platforms/powermac/backlight.c
+++ b/arch/powerpc/platforms/powermac/backlight.c
@@ -60,7 +60,8 @@ int pmac_has_backlight_type(const char *type)
         struct device_node* bk_node = find_devices("backlight");
 
         if (bk_node) {
-                char *prop = get_property(bk_node, "backlight-control", NULL);
+                const char *prop = get_property(bk_node,
+                                "backlight-control", NULL);
                 if (prop && strncmp(prop, type, strlen(type)) == 0)
                         return 1;
         }