diff --git a/libraries/AP_Proximity/AP_Proximity_RangeFinder.cpp b/libraries/AP_Proximity/AP_Proximity_RangeFinder.cpp
index 46c1ac833d..11bc6db333 100644
--- a/libraries/AP_Proximity/AP_Proximity_RangeFinder.cpp
+++ b/libraries/AP_Proximity/AP_Proximity_RangeFinder.cpp
@@ -18,7 +18,7 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <AP_RangeFinder/AP_RangeFinder.h>
-#include <AP_RangeFinder/RangeFinder_Backend.h>
+#include <AP_RangeFinder/AP_RangeFinder_Backend.h>
 
 // update the state of the sensor
 void AP_Proximity_RangeFinder::update(void)