1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_http.c b/plugins/check_http.c
index 52040281..56e87bbf 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -207,7 +207,7 @@ process_arguments (int argc, char **argv)
     {"port", required_argument, 0, 'p'},
     {"authorization", required_argument, 0, 'a'},
     {"proxy_authorization", required_argument, 0, 'b'},
-    {"header_string", required_argument, 0, 'd'},
+    {"header-string", required_argument, 0, 'd'},
     {"string", required_argument, 0, 's'},
     {"expect", required_argument, 0, 'e'},
     {"regex", required_argument, 0, 'r'},