diff --git a/com.unity.ml-agents/Plugins/ProtoBuffer/System.Interactive.Async.dll.meta b/com.unity.ml-agents/Plugins/ProtoBuffer/System.Interactive.Async.dll.meta
index 969150b326..eb7680bdae 100644
--- a/com.unity.ml-agents/Plugins/ProtoBuffer/System.Interactive.Async.dll.meta
+++ b/com.unity.ml-agents/Plugins/ProtoBuffer/System.Interactive.Async.dll.meta
@@ -8,7 +8,7 @@ PluginImporter:
   defineConstraints: []
   isPreloaded: 0
   isOverridable: 0
-  isExplicitlyReferenced: 0
+  isExplicitlyReferenced: 1
   validateReferences: 1
   platformData:
   - first: