diff -r 6bffbe8be665 -r 2f382fb2036c build/s60/3rd_edition/platform.mmh
--- a/build/s60/3rd_edition/platform.mmh	Mon Oct 25 10:37:01 2010 +0100
+++ b/build/s60/3rd_edition/platform.mmh	Mon Oct 25 13:21:33 2010 +0100
@@ -32,6 +32,7 @@
 #define FSHELL_NO_MD4_SUPPORT
 
 #define FSHELL_PLATFORM_S60 3
+#define FSHELL_OPEN_SIGNED
 
 #endif // FSHELL_PLATFORM_MMH