diff --git a/src/IO/Progress.h b/src/IO/Progress.h
index 006058baea6..e1253ab8eb8 100644
--- a/src/IO/Progress.h
+++ b/src/IO/Progress.h
@@ -2,6 +2,7 @@
 
 #include <atomic>
 #include <cstddef>
+#include <functional>
 #include <common/types.h>
 
 #include <Core/Defines.h>