diff --git a/app/node/input.cpp b/app/node/input.cpp
index 83d715a52..bdd0551a7 100644
--- a/app/node/input.cpp
+++ b/app/node/input.cpp
@@ -225,6 +225,7 @@ void NodeInput::Init(Node* parent, const QString &id, NodeValue::Type type, cons
   default_value_ = default_val;
   array_size_ = 0;
   data_type_ = type;
+  is_array_ = false;
 
   primary_ = CreateImmediate();
 }
diff --git a/app/node/output/track/track.cpp b/app/node/output/track/track.cpp
index 735d08e1f..ae0dfc7f9 100644
--- a/app/node/output/track/track.cpp
+++ b/app/node/output/track/track.cpp
@@ -40,6 +40,7 @@ Track::Track() :
 {
   block_input_ = new NodeInput(this, QStringLiteral("block_in"), NodeValue::kNone);
   block_input_->SetKeyframable(false);
+  block_input_->SetIsArray(true);
   connect(block_input_, &NodeInput::InputConnected, this, &Track::BlockConnected);
   connect(block_input_, &NodeInput::InputDisconnected, this, &Track::BlockDisconnected);
 
diff --git a/app/node/output/viewer/viewer.cpp b/app/node/output/viewer/viewer.cpp
index f6d7a1a08..6ad79202d 100644
--- a/app/node/output/viewer/viewer.cpp
+++ b/app/node/output/viewer/viewer.cpp
@@ -40,6 +40,7 @@ ViewerOutput::ViewerOutput() :
   for (int i=0;i<Track::kCount;i++) {
     // Create track input
     NodeInput* track_input = new NodeInput(this, QStringLiteral("track_in_%1").arg(i), NodeValue::kNone);
+    track_input->SetIsArray(true);
     IgnoreInvalidationsFrom(track_input);
     track_inputs_.replace(i, track_input);