diff --git a/sgml-common.spec b/sgml-common.spec
index 6e532a5..ef485ab 100644
--- a/sgml-common.spec
+++ b/sgml-common.spec
@@ -1,6 +1,6 @@
 Name:          sgml-common
 Version:       0.6.3
-Release:       4mamba
+Release:       5mamba
 Summary:       Common SGML catalog and DTD files
 Group:         Applications/Text
 Vendor:        openmamba
@@ -41,9 +41,9 @@ URL:           http://www.iso.ch/cate/3524030.html
 %description -n xml-common
 The xml-common package contains a collection of entities and DTDs that are useful for processing XML, but that don't need to be included in multiple packages.
 
-
 %prep
 %setup -q
+%define _default_patch_fuzz 2
 %patch0 -p1 -b .umask
 %patch1 -p1 -b .xmldir
 %patch2 -p1 -b .quotes
@@ -134,6 +134,9 @@ fi
 %dir %{_datadir}/xml
 
 %changelog
+* Fri Nov 27 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.6.3-5mamba
+- specfile fix with rpm4
+
 * Fri May 02 2014 Silvan Calarco <silvan.calarco@mambasoft.it> 0.6.3-4mamba
 - don't own /etc/xml/catalog and update it in %post script