diff --git a/backend/src/api/lightning/clightning/clightning-convert.ts b/backend/src/api/lightning/clightning/clightning-convert.ts
index 75c8ec20c..5df51aadc 100644
--- a/backend/src/api/lightning/clightning/clightning-convert.ts
+++ b/backend/src/api/lightning/clightning/clightning-convert.ts
@@ -71,8 +71,11 @@ export async function convertAndmergeBidirectionalChannels(clChannels: any[]): P
 }
 
 export function convertChannelId(channelId): string {
-  const s = channelId.split('x').map(part => parseInt(part));
-  return BigInt((s[0] << 40) | (s[1] << 16) | s[2]).toString();
+  if (channelId.indexOf('/') !== -1) {
+    channelId = channelId.slice(0, -2);
+  }
+  const s = channelId.split('x').map(part => BigInt(part));
+  return ((s[0] << 40n) | (s[1] << 16n) | s[2]).toString();
 }
 
 /**
diff --git a/backend/src/tasks/lightning/network-sync.service.ts b/backend/src/tasks/lightning/network-sync.service.ts
index 826664cf4..405d39c37 100644
--- a/backend/src/tasks/lightning/network-sync.service.ts
+++ b/backend/src/tasks/lightning/network-sync.service.ts
@@ -430,10 +430,13 @@ class NetworkSyncService {
   }
 
   private toIntegerId(id: string): string {
-    if (config.LIGHTNING.BACKEND === 'lnd') {
+    if (config.LIGHTNING.BACKEND === 'cln') {
+      return convertChannelId(id);
+    }
+    else if (config.LIGHTNING.BACKEND === 'lnd') {
       return id;
     }
-    return convertChannelId(id);
+    return '';
   }
 
   /** Decodes a channel id returned by lnd as uint64 to a short channel id */