diff --git a/src/hitable_interface.hpp b/src/hitable_interface.hpp
new file mode 100644
index 0000000..a3f7d91
--- /dev/null
+++ b/src/hitable_interface.hpp
@@ -0,0 +1,12 @@
+#ifndef HITABLE_INTERFACE_HPP
+#define HITABLE_INTERFACE_HPP
+
+namespace godot {
+class Node;
+
+class HitableInterface {
+public:
+    virtual void damage(Node *origin, int amount) = 0; };
+}
+
+#endif // !HITABLE_INTERFACE_HPP