diff --git a/services/capture/src/routes/capture.js b/services/capture/src/routes/capture.js
index 158c224..0a6cd45 100644
--- a/services/capture/src/routes/capture.js
+++ b/services/capture/src/routes/capture.js
@@ -325,9 +325,13 @@ router.post('/start', async (req, res) => {
           error: `${source_type.toUpperCase()} caller mode requires: source_url`,
         });
       }
+    } else if (source_type === 'deltacast') {
+      if (device === undefined || device === null) {
+        return res.status(400).json({ error: 'deltacast source requires: device (board/port index)' });
+      }
     } else {
       return res.status(400).json({
-        error: `Unknown source_type: ${source_type}. Must be sdi, srt, or rtmp`,
+        error: `Unknown source_type: ${source_type}. Must be sdi, srt, rtmp, or deltacast`,
       });
     }