diff --git a/Spherical.h b/Spherical.h
index 2b70462..6d81193 100644
--- a/Spherical.h
+++ b/Spherical.h
@@ -8,7 +8,7 @@
 
 #include "Angle.h"
 
-class Vector3;
+struct Vector3;
 
 namespace Passer {