diff --git a/src/drivers/ll40ls/ll40ls.cpp b/src/drivers/ll40ls/ll40ls.cpp
index bc012e2e92..a69e6ee556 100644
--- a/src/drivers/ll40ls/ll40ls.cpp
+++ b/src/drivers/ll40ls/ll40ls.cpp
@@ -196,8 +196,8 @@ LL40LS::LL40LS(int bus, int address) :
 	_sensor_ok(false),
 	_measure_ticks(0),
 	_collect_phase(false),
-	_range_finder_topic(-1),
 	_class_instance(-1),
+	_range_finder_topic(-1),
 	_sample_perf(perf_alloc(PC_ELAPSED, "ll40ls_read")),
 	_comms_errors(perf_alloc(PC_COUNT, "ll40ls_comms_errors")),
 	_buffer_overflows(perf_alloc(PC_COUNT, "ll40ls_buffer_overflows"))