diff --git a/libraries/AP_RangeFinder/AP_RangeFinder_config.h b/libraries/AP_RangeFinder/AP_RangeFinder_config.h
index 173bad858dc8c9..ed10e44160ea68 100644
--- a/libraries/AP_RangeFinder/AP_RangeFinder_config.h
+++ b/libraries/AP_RangeFinder/AP_RangeFinder_config.h
@@ -155,7 +155,3 @@
 #ifndef AP_RANGEFINDER_WASP_ENABLED
 #define AP_RANGEFINDER_WASP_ENABLED AP_RANGEFINDER_BACKEND_DEFAULT_ENABLED
 #endif
-
-#ifndef AP_RANGEFINDER_JRE_SERIAL_ENABLED
-#define AP_RANGEFINDER_JRE_SERIAL_ENABLED AP_RANGEFINDER_BACKEND_DEFAULT_ENABLED
-#endif