diff --git a/pcbnew/pcb_track.h b/pcbnew/pcb_track.h
index b1fb13401f..6c45ef7f31 100644
--- a/pcbnew/pcb_track.h
+++ b/pcbnew/pcb_track.h
@@ -36,6 +36,7 @@
 #define CLASS_TRACK_H
 
 
+#include <mutex>
 #include <board_connected_item.h>
 #include <base_units.h>
 #include <geometry/shape_segment.h>