diff --git a/src/hal/tmc2130.h b/src/hal/tmc2130.h
index 5a95f7a..549d4cd 100644
--- a/src/hal/tmc2130.h
+++ b/src/hal/tmc2130.h
@@ -179,7 +179,7 @@ private:
     ErrorFlags errorFlags;
     bool initialized = false;
     bool enabled = false;
-    uint8_t sg_filter_threshold;
+    uint8_t sg_filter_threshold = 0;
     uint8_t sg_filter_counter = 0;
 };