diff --git a/Utils/random-shamir.cpp b/Utils/random-shamir.cpp
index 423f14fd7..db1ce3046 100644
--- a/Utils/random-shamir.cpp
+++ b/Utils/random-shamir.cpp
@@ -94,7 +94,7 @@ int main(int argc, const char** argv)
 	);
 
     opt.add(
-          "Player-Data", // Default.
+          PREP_DIR, // Default.
           0, // Required?
           1, // Number of args expected.
           0, // Delimiter if expecting multiple args.