diff --git a/main.c b/main.c
index 3d1c810..e3c0599 100644
--- a/main.c
+++ b/main.c
@@ -145,7 +145,7 @@ const struct option options[] = {
     {"debug",         1, 0, 'x'},
     
     #ifdef TCP_FASTOPEN_CONNECT
-    {"tfo ",          0, 0, 'F'},
+    {"tfo",           0, 0, 'F'},
     #endif
     {"auto",          1, 0, 'A'},
     {"auto-mode",     1, 0, 'L'},