diff -up oprofile-0.9.6/libpp/format_output.h.mutable oprofile-0.9.6/libpp/format_output.h
--- oprofile-0.9.6/libpp/format_output.h.mutable	2011-02-09 10:20:29.598713997 -0500
+++ oprofile-0.9.6/libpp/format_output.h	2011-02-09 11:39:48.504714000 -0500
@@ -91,7 +91,7 @@ protected:
 		symbol_entry const & symbol;
 		sample_entry const & sample;
 		size_t pclass;
-		mutable counts_t & counts;
+		counts_t & counts;
 		extra_images const & extra;
 		double diff;
 	};