diff --git a/client/common/cmdline.h b/client/common/cmdline.h
index 153c8c62f..07eb1c0c1 100644
--- a/client/common/cmdline.h
+++ b/client/common/cmdline.h
@@ -63,7 +63,7 @@ static const COMMAND_LINE_ARGUMENT_A args[] = {
 	{ "auth-only", COMMAND_LINE_VALUE_BOOL, NULL, BoolValueFalse, NULL, -1, NULL,
 	  "Authenticate only" },
 	{ "authentication", COMMAND_LINE_VALUE_BOOL, NULL, BoolValueTrue, NULL, -1, NULL,
-	  "Authentication (expermiental)" },
+	  "Authentication (experimental)" },
 	{ "auto-reconnect", COMMAND_LINE_VALUE_BOOL, NULL, BoolValueFalse, NULL, -1, NULL,
 	  "Automatic reconnection" },
 	{ "auto-reconnect-max-retries", COMMAND_LINE_VALUE_REQUIRED, "<retries>", NULL, NULL, -1, NULL,