diff --git a/include/input/Input.h b/include/input/Input.h
index e7d68fc..7ea2970 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -297,6 +297,8 @@
  */
 const char* motionClassificationToString(MotionClassification classification);
 
+const char* motionToolTypeToString(int32_t toolType);
+
 /**
  * Portion of FrameMetrics timeline of interest to input code.
  */