--- misc/xpdf-3.02/xpdf/Error.h.sav	2007-02-27 23:05:52.000000000 +0100
+++ misc/xpdf-3.02/xpdf/Error.h	2012-10-09 23:24:12.002455791 +0200
@@ -18,6 +18,6 @@
 #include <stdio.h>
 #include "config.h"
 
-extern void CDECL error(int pos, char *msg, ...);
+extern void CDECL error(int pos, const char *msg, ...);
 
 #endif
--- build/xpdf-3.02/xpdf/Error.cc.sav	2007-02-27 23:05:52.000000000 +0100
+++ build/xpdf-3.02/xpdf/Error.cc	2012-10-09 23:24:27.813569809 +0200
@@ -18,7 +18,7 @@
 #include "GlobalParams.h"
 #include "Error.h"
 
-void CDECL error(int pos, char *msg, ...) {
+void CDECL error(int pos, const char *msg, ...) {
   va_list args;
 
   // NB: this can be called before the globalParams object is created