Merge "Add disk fallback to LRU cache" into main
diff --git a/src/bit_reader.h b/src/bit_reader.h
index cc6953f..da25028 100644
--- a/src/bit_reader.h
+++ b/src/bit_reader.h
@@ -7,6 +7,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <functional>
 
 #include "puffin/src/include/puffin/common.h"
 
diff --git a/src/bit_writer.h b/src/bit_writer.h
index f349d40..b0729a0 100644
--- a/src/bit_writer.h
+++ b/src/bit_writer.h
@@ -7,6 +7,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <functional>
 
 #include "puffin/src/include/puffin/common.h"