diff --git a/include/myers.h b/include/myers.h
index 0eb0730..f6150a9 100644
--- a/include/myers.h
+++ b/include/myers.h
@@ -5,5 +5,6 @@
 #include "action_list.h"
 
 ActionList* myers_diff(File*, File*, size_t, size_t);
+void visualize_diff(File*, File*, ActionList*);
 
 #endif // MYERS_H