diff --git a/src/tools/cuebreakpoints.c b/src/tools/cuebreakpoints.c
index 8e43d51..fae240c 100644
--- a/src/tools/cuebreakpoints.c
+++ b/src/tools/cuebreakpoints.c
@@ -121,7 +121,7 @@ int main (int argc, char **argv)
 	int gaps = APPEND;
 
 	/* option variables */
-	char c;
+	int c;
 	/* getopt_long() variables */
 	extern char *optarg;
 	extern int optind;
diff --git a/src/tools/cueconvert.c b/src/tools/cueconvert.c
index ab7e6d2..06784e8 100644
--- a/src/tools/cueconvert.c
+++ b/src/tools/cueconvert.c
@@ -77,7 +77,7 @@ 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;
diff --git a/src/tools/cueprint.c b/src/tools/cueprint.c
index 8a674cd..898a75c 100644
--- a/src/tools/cueprint.c
+++ b/src/tools/cueprint.c
@@ -438,8 +438,9 @@ int main (int argc, char **argv)
 	int trackno = -1;		/* track number (-1 = unspecified, 0 = disc info) */
 	char *d_template = NULL;	/* disc template */
 	char *t_template = NULL;	/* track template */
+	/* option variables */
+	int c;
 	/* getopt_long() variables */
-	char c;
 	extern char *optarg;
 	extern int optind;