diff --git a/src/mfm_dup.cpp b/src/mfm_dup.cpp
index 97eeecf3..9bd2780a 100644
--- a/src/mfm_dup.cpp
+++ b/src/mfm_dup.cpp
@@ -50,6 +50,4 @@ mfm::dup(const Opts::Dup &opts_)
           throw std::runtime_error("invalid file type");
         }
     }
-
-  return 0;
 }