diff --git a/src/mergerfs.cpp b/src/mergerfs.cpp
index 8bcf13d9..3fa01eed 100644
--- a/src/mergerfs.cpp
+++ b/src/mergerfs.cpp
@@ -410,7 +410,7 @@ main(int    argc_,
     ;
 
   app.add_option("mountpoint")
-    ->default_val("")
+    ->default_val("foo")
     ->required()
     ;