diff --git a/services/node-agent/index.js b/services/node-agent/index.js
index 4453016..5f48f51 100644
--- a/services/node-agent/index.js
+++ b/services/node-agent/index.js
@@ -127,6 +127,8 @@ async function handleSidecarStart(body, res) {
       try {
         const dcEntries = fs.readdirSync('/dev').filter(n => /^deltacast\d+$/.test(n));
         for (const d of dcEntries) binds.push(`/dev/${d}:/dev/${d}`);
+        // VideoMaster SDK needs the board IPC shared-memory segment mounted too.
+        if (fs.existsSync('/dev/shm/deltacast')) binds.push('/dev/shm/deltacast:/dev/shm/deltacast');
       } catch (_) { /* /dev always exists */ }
     }