Index: src/tools/cuebreakpoints.c
--- src/tools/cuebreakpoints.c.orig
+++ src/tools/cuebreakpoints.c
@@ -106,7 +106,7 @@ int main (int argc, char **argv)
 	int gaps = APPEND;
 
 	/* option variables */
-	char c;
+	int c;
 	/* getopt_long() variables */
 	extern char *optarg;
 	extern int optind;