Index: arch/ppc32/src/mm/frame.c
===================================================================
--- arch/ppc32/src/mm/frame.c	(revision b9b14a83c9d561646c551c5f88572dbee1ba2280)
+++ arch/ppc32/src/mm/frame.c	(revision fe04594398a175db7fe2fccfec39a1b8e74b0a05)
@@ -57,6 +57,6 @@
 	}
 
-	/* First is exception vector, second is 'implementation specific' */
-	frame_mark_unavailable(0, 2);
+	/* First is exception vector, second is 'implementation specific', third and fourth is reserved */
+	frame_mark_unavailable(0, 4);
 	
 	/* Merge all zones to 1 big zone */