diff --git a/ChangeLog.d/ecdsa-verify-fixes.txt b/ChangeLog.d/ecdsa-verify-fixes.txt
new file mode 100644
index 000000000..6dbd4702e
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+++ b/ChangeLog.d/ecdsa-verify-fixes.txt
@@ -0,0 +1,5 @@
+Bugfix
+   * Fix ECDSA verification, where it was failing to validate the public key
+     for signatures where R == 1 and S == 1. This bug meant that it was
+     possible to verify such signatures with an invalid public key, in some
+     cases.