diff --git a/src/browser/ScriptManager.zig b/src/browser/ScriptManager.zig
index 4bd4148c..baf2f8c3 100644
--- a/src/browser/ScriptManager.zig
+++ b/src/browser/ScriptManager.zig
@@ -273,6 +273,10 @@ pub fn addFromElement(self: *ScriptManager, comptime from_parser: bool, script_e
             // Let the outer errdefer handle releasing the arena if client.request fails
         }
 
+        // If we return synchronously (like from cache), we would call evaluate() immediately.
+        const was_evaluating = self.is_evaluating;
+        self.is_evaluating = true;
+
         try self.client.request(.{
             .url = url,
             .ctx = script,
@@ -290,6 +294,9 @@ pub fn addFromElement(self: *ScriptManager, comptime from_parser: bool, script_e
             .done_callback = Script.doneCallback,
             .error_callback = Script.errorCallback,
         });
+
+        self.is_evaluating = was_evaluating;
+
         handover = true;
 
         if (comptime IS_DEBUG) {