diff --git a/tuxpaint.spec b/tuxpaint.spec
index 0e8d5ee..06f1d3a 100644
--- a/tuxpaint.spec
+++ b/tuxpaint.spec
@@ -1,6 +1,6 @@
 Name:           tuxpaint
 Version:        0.9.21
-Release:        11%{?dist}
+Release:        12%{?dist}
 
 Epoch:          1
 Summary:        Drawing program designed for young children
@@ -60,7 +60,7 @@ Development files for tuxpaint extensions/plugins
 
 sed -i -e '/\/gnome\/apps\/Graphics/d' Makefile
 find docs -type f -exec perl -pi -e 's/\r\n/\n/' {} \;
-find docs -type f -perm +100 -exec chmod a-x {} \;
+find docs -type f -perm /100 -exec chmod a-x {} \;
 
 make PREFIX=/usr MAGIC_PREFIX=%{_libdir}/tuxpaint/plugins tp-magic-config
 
@@ -113,6 +113,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_includedir}/tuxpaint/
 
 %changelog
+* Thu Aug 22 2013 Ralf Corsépius <corsepiu@fedoraproject.org> -  1:0.9.21-12
+- Use find -perm /<mode> instead of obsolete +<mode> (FTBFS, RHBZ#992825).
+
 * Sun Aug 04 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1:0.9.21-11
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild