diff --git a/src/graph/tuning.cc b/src/graph/tuning.cc
index 3faf2cd73a..e858888ffc 100644
--- a/src/graph/tuning.cc
+++ b/src/graph/tuning.cc
@@ -736,7 +736,7 @@ ncclResult_t ncclTopoTuneModel(struct ncclComm* comm, int minCompCap, int maxCom
   for (int c=0; c<NCCL_NUM_FUNCTIONS; c++) for (int a=0; a<NCCL_NUM_ALGORITHMS; a++) for (int p=0; p<NCCL_NUM_PROTOCOLS; p++) {
     // Disable LL protocol on gfx12xx
     int pEnable = (p == NCCL_PROTO_LL && IsArchMatch(comm->topo->nodes[GPU].nodes[0].gpu.gcn, "gfx12")) ? 0 : protoEnable[c*NCCL_NUM_PROTOCOLS+p];
-    if (p == NCCL_PROTO_LL128) {
+    if (pEnable != 0 && p == NCCL_PROTO_LL128) {
 #if defined(__HIP_PLATFORM_AMD__) || defined(__HIPCC__)
 #if defined(ENABLE_LL128)
       // Enable LL128 by default only on gfx90a with available tuning table