diff --git a/libraries/AP_OpticalFlow/AP_OpticalFlow.h b/libraries/AP_OpticalFlow/AP_OpticalFlow.h
index e1fb75af08..98c5a5d001 100644
--- a/libraries/AP_OpticalFlow/AP_OpticalFlow.h
+++ b/libraries/AP_OpticalFlow/AP_OpticalFlow.h
@@ -142,4 +142,4 @@ namespace AP {
     OpticalFlow *opticalflow();
 }
 
-#include "OpticalFlow_backend.h"
+#include "AP_OpticalFlow_Backend.h"
diff --git a/libraries/AP_OpticalFlow/AP_OpticalFlow_HereFlow.h b/libraries/AP_OpticalFlow/AP_OpticalFlow_HereFlow.h
index 6675481c15..3c9ed02551 100644
--- a/libraries/AP_OpticalFlow/AP_OpticalFlow_HereFlow.h
+++ b/libraries/AP_OpticalFlow/AP_OpticalFlow_HereFlow.h
@@ -1,5 +1,5 @@
 #pragma once
-#include "OpticalFlow_backend.h"
+#include "AP_OpticalFlow_Backend.h"
 
 #if HAL_ENABLE_LIBUAVCAN_DRIVERS