diff --git a/src/tracks/ui/Scrubbing.cpp b/src/tracks/ui/Scrubbing.cpp
index 031120ca8..66a7ec5e1 100644
--- a/src/tracks/ui/Scrubbing.cpp
+++ b/src/tracks/ui/Scrubbing.cpp
@@ -10,6 +10,7 @@ Paul Licameli split from TrackPanel.cpp
 
 #include "Scrubbing.h"
 #include "../../Experimental.h"
+#include <functional>
 
 #include "../../AudioIO.h"
 #include "../../Project.h"