diff --git a/src/backing.h b/src/backing.h
index 55f628f..6139fcf 100755
--- a/src/backing.h
+++ b/src/backing.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "utils.h"
+#include "disk.h"
 
 /// @brief Checks whether the given string is a valid backing identifier. If the string is not a valid backing identifier, the call will return a failure result with an error message.
 /// @param backing The string to check.