diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index b67bb5d..8dc5123 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -36,8 +36,8 @@
 
 extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
 extern int platform_get_irq(struct platform_device *, unsigned int);
-extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, char *);
-extern int platform_get_irq_byname(struct platform_device *, char *);
+extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);
+extern int platform_get_irq_byname(struct platform_device *, const char *);
 extern int platform_add_devices(struct platform_device **, int);
 
 extern struct platform_device *platform_device_register_simple(const char *, int id,