Index: src/tools/cueconvert.c
--- src/tools/cueconvert.c.orig
+++ src/tools/cueconvert.c
@@ -63,7 +63,7 @@ int main (int argc, char **argv)
 	int iformat = UNKNOWN;
 	int oformat = UNKNOWN;
 	/* option variables */
-	char c;
+	int c;
 	/* getopt_long() variables */
 	extern char *optarg;
 	extern int optind;