diff --git a/src/xrt/tracking/hand/mercury/hg_sync.hpp b/src/xrt/tracking/hand/mercury/hg_sync.hpp
index 5c1c75464..d3a2857c3 100644
--- a/src/xrt/tracking/hand/mercury/hg_sync.hpp
+++ b/src/xrt/tracking/hand/mercury/hg_sync.hpp
@@ -35,8 +35,6 @@
 #include "util/u_frame.h"
 #include "util/u_var.h"
 
-#include "util/u_template_historybuf.hpp"
-
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>