diff --git a/source/blender/depsgraph/intern/depsnode.cc b/source/blender/depsgraph/intern/depsnode.cc
index 8d21f6e0034..866e9115648 100644
--- a/source/blender/depsgraph/intern/depsnode.cc
+++ b/source/blender/depsgraph/intern/depsnode.cc
@@ -114,6 +114,10 @@ void TimeSourceDepsNode::tag_update(Depsgraph *graph)
 
 /* Root Node ============================================== */
 
+RootDepsNode::RootDepsNode() : time_source(NULL)
+{
+}
+
 RootDepsNode::~RootDepsNode()
 {
 	OBJECT_GUARDED_DELETE(time_source, TimeSourceDepsNode);
diff --git a/source/blender/depsgraph/intern/depsnode.h b/source/blender/depsgraph/intern/depsnode.h
index 993bb6971e7..84554aef7ea 100644
--- a/source/blender/depsgraph/intern/depsnode.h
+++ b/source/blender/depsgraph/intern/depsnode.h
@@ -127,6 +127,7 @@ struct TimeSourceDepsNode : public DepsNode {
 
 /* Root Node. */
 struct RootDepsNode : public DepsNode {
+	RootDepsNode();
 	~RootDepsNode();
 
 	TimeSourceDepsNode *add_time_source(const string &name = "");