diff --git a/tools/topo_expl/Makefile b/tools/topo_expl/Makefile
index a2dc9704d6..fcf838d232 100644
--- a/tools/topo_expl/Makefile
+++ b/tools/topo_expl/Makefile
@@ -6,7 +6,7 @@ endif
 HIPCC = $(HIP_PATH)/bin/hipcc
 
 EXE = topo_expl
-CXXFLAGS = -g -O3 -Iinclude -I../../src/include -I../../src/graph/ -DTOPO_EXPL -DENABLE_TRACE
+CXXFLAGS = -g -O3 -Iinclude -I../../src/include -I../../src/graph/ -DTOPO_EXPL -DENABLE_TRACE -lnuma
 
 files = $(EXE).cpp model.cpp utils.cpp ../../src/graph/topo.cc ../../src/graph/rings.cc ../../src/graph/paths.cc ../../src/graph/trees.cc \
 	../../src/graph/search.cc ../../src/graph/connect.cc ../../src/graph/tuning.cc ../../src/graph/xml.cc ../../src/misc/nvmlwrap_stub.cc
diff --git a/tools/topo_expl/utils.cpp b/tools/topo_expl/utils.cpp
index ac007f10b0..02afeeca0f 100644
--- a/tools/topo_expl/utils.cpp
+++ b/tools/topo_expl/utils.cpp
@@ -30,7 +30,7 @@
 #include "model.h"
 #include "utils.h"
 
-const char* ncclFuncStr[NCCL_NUM_FUNCTIONS] = { "Broadcast", "Reduce", "AllGather", "ReduceScatter", "AllReduce" };
+const char* ncclFuncStr[NCCL_NUM_FUNCTIONS+3] = { "Broadcast", "Reduce", "AllGather", "ReduceScatter", "AllReduce", "Gather", "Scatter", "AllToAll" };
 const char* ncclAlgoStr[NCCL_NUM_ALGORITHMS] = { "Tree", "Ring", "CollNet" };
 const char* ncclProtoStr[NCCL_NUM_PROTOCOLS] = { "LL", "LL128", "Simple" };