diff --git a/python/setup.py.in b/python/setup.py.in
index 1db4191..555b13f 100644
--- a/python/setup.py.in
+++ b/python/setup.py.in
@@ -13,7 +13,7 @@
                                     "${CMAKE_CURRENT_COURCE_DIR}/rpc.h"
                                    ],
                            libraries=["netconf2"],
-                           extra_compile_args=["-Wall", "-I${PROJECT_BINARY_DIR}" @SSH_DEFINE@ @TLS_DEFINE@],
+                           extra_compile_args=["-Wall", "-I${CMAKE_CURRENT_BINARY_DIR}" @SSH_DEFINE@ @TLS_DEFINE@],
                            extra_link_args=["-L${CMAKE_CURRENT_BINARY_DIR}/.."],
                         )