diff --git a/libglvnd.spec b/libglvnd.spec
index 9405d0e..dab65c3 100644
--- a/libglvnd.spec
+++ b/libglvnd.spec
@@ -11,7 +11,7 @@
 
 Name:           libglvnd
 Version:        0.2.999
-Release:        20%{?commit0:.%{date}git%{shortcommit0}}%{?dist}
+Release:        21%{?commit0:.%{date}git%{shortcommit0}}%{?dist}
 # Provide an upgrade path from the negativo17.org pkgs which have Epoch 1
 Epoch:          1
 Summary:        The GL Vendor-Neutral Dispatch library
@@ -245,6 +245,9 @@ xvfb-run -a  make check V=1 || cat `find . -name test-suite.log`
 
 
 %changelog
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1:0.2.999-21.20170620gitd850cdd
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
 * Fri Jul 07 2017 Igor Gnatenko <ignatenko@redhat.com> - 1:0.2.999-20.20170620gitd850cdd
 - Rebuild due to bug in RPM (RHBZ #1468476)