1 files changed, 2 insertions, 0 deletions

diff --git a/point3d.h b/point3d.h
index aba6136..2e37e42 100644
--- a/point3d.h
+++ b/point3d.h
@@ -1,6 +1,8 @@
 #ifndef POINT3D_H
 #define POINT3D_H
 
+#include "math.h"
+
 struct Point3d
 {
     float x, y, z;