diff --git a/mlton.spec b/mlton.spec
index a394dc7..71bfc25 100644
--- a/mlton.spec
+++ b/mlton.spec
@@ -4,7 +4,7 @@
 
 Name: mlton
 Version: 20180207
-Release: 11%{?dist}
+Release: 12%{?dist}
 Summary: Optimizing compiler for Standard ML
 
 License: MIT
@@ -110,6 +110,9 @@ rm -rf $RPM_BUILD_ROOT%{_libdir}/mlton/sml/ckit-lib/regression
 
 
 %changelog
+* Thu Jul 25 2019 Fedora Release Engineering <releng@fedoraproject.org> - 20180207-12
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
+
 * Sat Apr 27 2019 Adam Goode <adam@spicenitz.org> - 20180207-11
 - Add missing patch and re-bootstrap for ppc64le (RHBZ #1676288)