1 files changed, 4 insertions, 0 deletions
diff --git a/intern/cycles/graph/node.h b/intern/cycles/graph/node.h
index 53425f5faf1..d198c38be32 100644
--- a/intern/cycles/graph/node.h
+++ b/intern/cycles/graph/node.h
@@ -24,6 +24,7 @@
 
 CCL_NAMESPACE_BEGIN
 
+class MD5Hash;
 struct Node;
 struct NodeType;
 struct Transform;
@@ -88,6 +89,9 @@ struct Node
 	/* equals */
 	bool equals(const Node& other) const;
 
+	/* compute hash of node and its socket values */
+	void hash(MD5Hash& md5);
+
 	ustring name;
 	const NodeType *type;
 };