diff --git a/pyprof/nvtx/__init__.py b/pyprof/nvtx/__init__.py
index 238c1f0..9c94c73 100644
--- a/pyprof/nvtx/__init__.py
+++ b/pyprof/nvtx/__init__.py
@@ -17,5 +17,3 @@
 
 from .nvmarker import init
 from .nvmarker import add_wrapper as wrap
-from .nvmarker import start_graph
-from .nvmarker import stop_graph