--- /dev/null
+--- barcode-0.98/plessey.c~ 2000-11-07 17:43:18.000000000 +0000
++++ barcode-0.98/plessey.c 2015-04-05 20:20:57.170658797 +0000
+@@ -148,7 +148,7 @@
+ checkptr[i+j] ^= check[j];
+ }
+ for (i = 0; i < 8; i++) {
+- sprintf(ptr, patterns[checkptr[strlen(text) * 4 + i]]);
++ sprintf(ptr, "%s", patterns[checkptr[strlen(text) * 4 + i]]);
+ ptr += 2;
+ }
+ fprintf(stderr, "CRC: ");