diff --git a/src/66/66-inservice.c b/src/66/66-inservice.c
index 653050ecbb45cad06a78fb62b7a54bca988c7275..69d052ba1ee25a7f1c47c60ebd6df5c3417ce570 100644
--- a/src/66/66-inservice.c
+++ b/src/66/66-inservice.c
@@ -113,7 +113,7 @@ static inline void info_help (void)
 "\n"
 "options :\n"
 "	-h: print this help\n"
-"	-c: use color\n"
+"	-z: use color\n"
 "	-v: increase/decrease verbosity\n"
 "	-n: do not display the field name\n"
 "	-o: comma separated list of field to display\n"