diff --git a/src/mergerfs.cpp b/src/mergerfs.cpp
index bae83b42..666bf125 100644
--- a/src/mergerfs.cpp
+++ b/src/mergerfs.cpp
@@ -391,6 +391,7 @@ main(int    argc_,
   app.description("mergerfs: A featureful union filesystem");
   app.name("USAGE: mergerfs");
   app.add_option("-o",opts)
+    ->description("")
     ->delimiter(',');
 
   app.add_option("-f,--foreground",foreground)