diff --git a/Angle.cpp b/Angle.cpp
index 8acbdf8..cb7b6e0 100644
--- a/Angle.cpp
+++ b/Angle.cpp
@@ -17,6 +17,10 @@ template <typename T> const AngleOf<T> AngleOf<T>::zero = AngleOf<T>();
 
 //===== Generic
 
+template <typename T> AngleOf<T>::AngleOf() : value(0) {}
+
+template <typename T> const AngleOf<T> AngleOf<T>::zero = AngleOf<T>();
+
 template <typename T> AngleOf<T> AngleOf<T>::Binary(T rawValue) {
   AngleOf<T> angle = AngleOf<T>();
   angle.SetBinary(rawValue);