diff --git a/projects/rccl/src/graph/paths.cc b/projects/rccl/src/graph/paths.cc
index 6ba2621dc7..762c6a639c 100644
--- a/projects/rccl/src/graph/paths.cc
+++ b/projects/rccl/src/graph/paths.cc
@@ -707,7 +707,7 @@ void ncclTopoFree(struct ncclTopoSystem* system) {
   free(system);
 }
 
-NCCL_PARAM(NChannelsPerNetPeer, "NCHANNELS_PER_NET_PEER", 2);
+NCCL_PARAM(NChannelsPerNetPeer, "NCHANNELS_PER_NET_PEER", 1);
 
 static ncclResult_t ncclTopoGetNchannels(struct ncclTopoSystem* system, int g /*local gpu index*/, int peerRank, int* nChannels) {
   int peer;