diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 677ee72ce..1e4acf142 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -264,12 +264,12 @@ if(GTSAM_UNSTABLE_BUILD_PYTHON)
 endif()
 
 # Add custom target so we can install with `make python-install`
-if (NOT WIN32)
+if (NOT WIN32) # WIN32=1 is target platform is Windows
     add_custom_target(python-install
         COMMAND stubgen -q -p gtsam && rsync -a \"out/gtsam/\" gtsam && ${PYTHON_EXECUTABLE} -m pip install --user .
         DEPENDS ${GTSAM_PYTHON_DEPENDENCIES}
         WORKING_DIRECTORY ${GTSAM_PYTHON_BUILD_DIRECTORY})
-elseif()
+else()
     #TODO(Varun) Find rsync equivalent on Windows
     add_custom_target(python-install
         COMMAND ${PYTHON_EXECUTABLE} -m pip install --user .