diff --git a/gtsam_unstable/CMakeLists.txt b/gtsam_unstable/CMakeLists.txt
index a27c1314b..eb4937cf1 100644
--- a/gtsam_unstable/CMakeLists.txt
+++ b/gtsam_unstable/CMakeLists.txt
@@ -131,7 +131,7 @@ if (GTSAM_INSTALL_CYTHON_TOOLBOX)
                                     "${GTSAM_CYTHON_INSTALL_PATH}/gtsam" # install path
                                     )
     add_dependencies(gtsam_unstable_cython_wrapper gtsam_cython_wrapper)
-    # making the cython/gtsam folder a python package, so gtsam can be found while wrapping gtsam_unstable
+    # making the build/cython/gtsam folder a python package, so gtsam can be found while wrapping gtsam_unstable
     add_custom_target(copy_gtsam_init COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_SOURCE_DIR}/cython/gtsam/__init__.py" "${CMAKE_BINARY_DIR}/cython/gtsam")
     add_dependencies(gtsam_unstable_cython_wrapper copy_gtsam_init)
 endif ()