From 6b15a8d3c91be1b17ae0c07e7d2435460ef226f3 Mon Sep 17 00:00:00 2001
From: Eric Hegnes <eric.hegnes@gmail.com>
Date: Wed, 27 Sep 2017 15:24:06 -0400
Subject: [PATCH] Fix unscoped `sqrtf()`

---
 include/gestures/include/finger_metrics.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/gestures/include/finger_metrics.h b/include/gestures/include/finger_metrics.h
index 5440e19..f9407f6 100644
--- a/include/gestures/include/finger_metrics.h
+++ b/include/gestures/include/finger_metrics.h
@@ -5,6 +5,8 @@
 #ifndef GESTURES_FINGER_METRICS_H_
 #define GESTURES_FINGER_METRICS_H_
 
+#include <math.h>
+
 #include "gestures/include/gestures.h"
 #include "gestures/include/prop_registry.h"
 #include "gestures/include/vector.h"