--- ncdump/dumplib.c.str	2010-02-11 23:41:03.000000000 +0100
+++ ncdump/dumplib.c	2010-02-11 23:41:17.000000000 +0100
@@ -1005,7 +1005,7 @@
     char *prefix = "0X";
     int prelen = strlen(prefix);
 
-    snprintf(sp, prelen + 1, prefix);
+    snprintf(sp, prelen + 1, "%s", prefix);
     sp += prelen;
     for(i = 0; i < size; i++) {
 	int res;