diff --git a/components/script/messaging.rs b/components/script/messaging.rs
index 08d6fc841cf..9f9453305b8 100644
--- a/components/script/messaging.rs
+++ b/components/script/messaging.rs
@@ -92,6 +92,7 @@ impl MixedMessage {
                 ScriptThreadMessage::SetWebGPUPort(..) => None,
                 ScriptThreadMessage::SetScrollStates(id, ..) => Some(*id),
                 ScriptThreadMessage::EvaluateJavaScript(id, _, _) => Some(*id),
+                ScriptThreadMessage::SetNetWorkState(..) => None,
             },
             MixedMessage::FromScript(inner_msg) => match inner_msg {
                 MainThreadScriptMsg::Common(CommonScriptMsg::Task(_, _, pipeline_id, _)) => {
diff --git a/components/shared/script/lib.rs b/components/shared/script/lib.rs
index 29acc51765c..d6c0531e6c3 100644
--- a/components/shared/script/lib.rs
+++ b/components/shared/script/lib.rs
@@ -248,6 +248,8 @@ pub enum ScriptThreadMessage {
     /// Evaluate the given JavaScript and return a result via a corresponding message
     /// to the Constellation.
     EvaluateJavaScript(PipelineId, JavaScriptEvaluationId, String),
+    /// Parameter indicates if online (true) or offline (false)
+    SetNetWorkState(bool),
 }
 
 impl fmt::Debug for ScriptThreadMessage {