diff --git a/src/mfm_dup.cpp b/src/mfm_dup.cpp
index 2e8be7ba..d706c41c 100644
--- a/src/mfm_dup.cpp
+++ b/src/mfm_dup.cpp
@@ -2,6 +2,7 @@
 
 #include "str.hpp"
 #include "fs_clonepath.hpp"
+#include "fs_copyfile.hpp"
 
 #include "fmt/core.h"