diff --git a/ChangeLog.d/negative-zero-from-add.txt b/ChangeLog.d/negative-zero-from-add.txt
new file mode 100644
index 000000000..107d858d3
--- /dev/null
+++ b/ChangeLog.d/negative-zero-from-add.txt
@@ -0,0 +1,6 @@
+Bugfix
+   * In the bignum module, operations of the form (-A) - (+A) or (-A) - (-A)
+     with A > 0 created an unintended representation of the value 0 which was
+     not processed correctly by some bignum operations. Fix this. This had no
+     consequence on cryptography code, but might affect applications that call
+     bignum directly and use negative numbers.