diff --git a/ChangeLog.d/mpi_read_negative_zero.txt b/ChangeLog.d/mpi_read_negative_zero.txt
new file mode 100644
index 0000000..e338de7
--- /dev/null
+++ b/ChangeLog.d/mpi_read_negative_zero.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * mbedtls_mpi_read_string on "-0" produced an MPI object that was not treated
+     as equal to 0 in all cases. Fix it to produce the same object as "0".