diff --git a/core/include/traccc/fitting/kalman_filter/gain_matrix_updater.hpp b/core/include/traccc/fitting/kalman_filter/gain_matrix_updater.hpp
index 511b0af58d..1b8d510ad8 100644
--- a/core/include/traccc/fitting/kalman_filter/gain_matrix_updater.hpp
+++ b/core/include/traccc/fitting/kalman_filter/gain_matrix_updater.hpp
@@ -89,9 +89,6 @@ struct gain_matrix_updater {
         trk_state.predicted().set_vector(predicted_vec);
         trk_state.predicted().set_covariance(predicted_cov);
 
-        // Correct sign for line detector
-        // if (mask_t::shape::mask_type == detray::mask_types::line) {
-
         if constexpr (std::is_same_v<typename mask_t::shape,
                                      detray::line<true>> ||
                       std::is_same_v<typename mask_t::shape,
diff --git a/extern/detray/CMakeLists.txt b/extern/detray/CMakeLists.txt
index 24bf614b1c..71c7da3012 100644
--- a/extern/detray/CMakeLists.txt
+++ b/extern/detray/CMakeLists.txt
@@ -18,7 +18,7 @@ message( STATUS "Building Detray as part of the TRACCC project" )
 
 # Declare where to get Detray from.
 set( TRACCC_DETRAY_SOURCE
-   "URL;https://github.com/acts-project/detray/archive/refs/tags/v0.45.0.tar.gz;URL_MD5;0569160697740ec398420f294c46b38e"
+"GIT_REPOSITORY;https://github.com/beomki-yeo/detray;GIT_TAG;remove-unused-var"
    CACHE STRING "Source for Detray, when built as part of this project" )
 
 mark_as_advanced( TRACCC_DETRAY_SOURCE )