diff -up snack2.2.10/generic/jkSoundFile.c.format-security snack2.2.10/generic/jkSoundFile.c
--- snack2.2.10/generic/jkSoundFile.c.format-security	2013-12-09 16:24:39.287083799 -0500
+++ snack2.2.10/generic/jkSoundFile.c	2013-12-09 16:26:03.693939137 -0500
@@ -2380,7 +2380,7 @@ PutCslHeader(Sound *s, Tcl_Interp *inter
   sprintf(&buf[12], "HEDR");
   PutLELong(buf, 16, 32);
   Tcl_GlobalEvalObj(s->interp, Tcl_NewStringObj(CSL_DATECOMMAND, -1));
-  sprintf(&buf[20], Tcl_GetStringResult(s->interp));
+  sprintf(&buf[20], "%s", Tcl_GetStringResult(s->interp));
   
   PutLELong(buf, 40, s->samprate);
   PutLELong(buf, 44, s->length);