diff --git a/src/enqueue.cc b/src/enqueue.cc
index 0e80406e9e..6aa589a0b8 100644
--- a/src/enqueue.cc
+++ b/src/enqueue.cc
@@ -319,7 +319,7 @@ static void finishPlan(struct ncclComm* comm, struct ncclKernelPlan* plan) {
   }
 }
 
-NCCL_PARAM(GraphRegister, "GRAPH_REGISTER", 1);
+NCCL_PARAM(GraphRegister, "GRAPH_REGISTER", 0); // LWPCOMMLIBS-632: off by default for RCCL as unsupported feature.
 
 static ncclResult_t getCollNetSupport(struct ncclComm* comm, struct ncclTaskColl* task, int* collNetSupport);
 rccl_static ncclResult_t getAlgoInfo(
diff --git a/src/register/register.cc b/src/register/register.cc
index 2ec9ab5bc8..d49b159cbb 100644
--- a/src/register/register.cc
+++ b/src/register/register.cc
@@ -18,7 +18,7 @@
 
 using namespace rccl;
 
-NCCL_PARAM(LocalRegister, "LOCAL_REGISTER", 1);
+NCCL_PARAM(LocalRegister, "LOCAL_REGISTER", 0); // LWPCOMMLIBS-632: off by default for RCCL as unsupported feature.
 
 static ncclResult_t regFindHandleFromSymAddr(struct ncclComm* comm, void* baseSymPtr, struct ncclReg** handle) {
   struct ncclRegCache* cache = &comm->regCache;