diff --git a/newsfragments/xxx.bugfix b/newsfragments/xxx.bugfix
new file mode 100644
index 000000000..93337e3d6
--- /dev/null
+++ b/newsfragments/xxx.bugfix
@@ -0,0 +1,2 @@
+``FormatMRC``: relax restrictive check on the overloaded MZ header
+value, which caused failures to read files where MZ == 1