diff --git a/ports/science-libndtp/portfile.cmake b/ports/science-libndtp/portfile.cmake
index 00be769..7056fe4 100644
--- a/ports/science-libndtp/portfile.cmake
+++ b/ports/science-libndtp/portfile.cmake
@@ -7,7 +7,7 @@ vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
 #   See https://github.com/Microsoft/vcpkg/blob/master/scripts/cmake/vcpkg_from_git.cmake
 #       https://github.com/microsoft/vcpkg/issues/6886
 set(URL "git@github.com:sciencecorp/libndtp.git")
-set(REF "9af56efcd7fc03c01f4d54d426765d6ce4cd3acc")
+set(REF "415345f470cc96d369ecdd84f3952f0ae63251a7")
 set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/${PORT})
 
 if(NOT EXISTS "${SOURCE_PATH}/.git")