diff --git a/drivers/net/appletalk/cops.h b/drivers/net/appletalk/cops.h
index c68ba9c2ef46..fd2750b269c8 100644
--- a/drivers/net/appletalk/cops.h
+++ b/drivers/net/appletalk/cops.h
@@ -51,7 +51,7 @@
 struct ltfirmware
 {
         unsigned int length;
-        unsigned char * data;
+        const unsigned char *data;
 };
 
 #define DAYNA 1