diff --git a/OpenImageIO.spec b/OpenImageIO.spec
index 19d4dbe..b666f38 100644
--- a/OpenImageIO.spec
+++ b/OpenImageIO.spec
@@ -3,7 +3,7 @@
 
 Name:           OpenImageIO
 Version:        1.7.15
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Library for reading and writing images
 
 Group:          Development/Libraries
@@ -186,6 +186,9 @@ cp -a src/doc/*.1 %{buildroot}%{_mandir}/man1
 
 
 %changelog
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.7.15-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
 * Fri Jul 21 2017 Kalev Lember <klember@redhat.com> - 1.7.15-3
 - Rebuilt for Boost 1.64