diff --git a/repmgr.c b/repmgr.c
index e493b128..42f163ed 100644
--- a/repmgr.c
+++ b/repmgr.c
@@ -117,7 +117,7 @@ main(int argc, char **argv)
 	}
 
 
-	while ((c = getopt_long(argc, argv, "d:h:p:U:D:f:R:w:F:v", long_options,
+	while ((c = getopt_long(argc, argv, "d:h:p:U:D:f:R:w:F:I:v", long_options,
 	                        &optindex)) != -1)
 	{
 		switch (c)