diff -ur libapogee2-2.2/Apn.h libapogee2-2.2.format/Apn.h
--- libapogee2-2.2/Apn.h	2008-11-18 10:44:08.000000000 +0100
+++ libapogee2-2.2.format/Apn.h	2013-12-03 10:48:48.997278318 +0100
@@ -11,7 +11,7 @@
 #ifdef APOGEE_DLL_OUTPUT
 
 #ifdef LINUX
-#define AltaDebugOutputString(__X__) fprintf(stderr,__X__)
+#define AltaDebugOutputString(__X__) fprintf(stderr, "%s", __X__)
 #else
 #define AltaDebugString(__X__) OutputDebugString(__X__)
 #endif