diff --git a/app/core.cpp b/app/core.cpp
index 51ee9d95a..0d8fdc42b 100644
--- a/app/core.cpp
+++ b/app/core.cpp
@@ -379,6 +379,7 @@ void Core::DeclareTypesForQt()
   qRegisterMetaType<NodeKeyframe::Type>();
   qRegisterMetaType<Decoder::RetrieveState>();
   qRegisterMetaType<TimeRange>();
+  qRegisterMetaType<Color>();
 }
 
 void Core::StartGUI(bool full_screen)