diff --git a/src/compute_born_matrix.cpp b/src/EXTRA-COMPUTE/compute_born_matrix.cpp
similarity index 100%
rename from src/compute_born_matrix.cpp
rename to src/EXTRA-COMPUTE/compute_born_matrix.cpp
diff --git a/src/compute_born_matrix.h b/src/EXTRA-COMPUTE/compute_born_matrix.h
similarity index 100%
rename from src/compute_born_matrix.h
rename to src/EXTRA-COMPUTE/compute_born_matrix.h