diff -Naur linux-0.01-rm-1.2/include/a.out.h linux-0.01-rm-1.3/include/a.out.h
--- linux-0.01-rm-1.2/include/a.out.h	2007-11-13 20:26:54.000000000 +0100
+++ linux-0.01-rm-1.3/include/a.out.h	2007-11-13 20:44:08.000000000 +0100
@@ -15,7 +15,7 @@
 };
 
 #ifndef N_MAGIC
-#define N_MAGIC(exec) ((exec).a_magic)
+#define N_MAGIC(exec) ((exec).a_magic & 0xffff )
 #endif
 
 #ifndef OMAGIC