diff --git a/elfutils.spec b/elfutils.spec
index 5b11a7f..a5fff29 100644
--- a/elfutils.spec
+++ b/elfutils.spec
@@ -1,8 +1,10 @@
 %define        libname          libelf
 %define        _program_prefix  eu-
 
+%define portability_version 0.163
+
 Name:          elfutils
-Version:       0.163
+Version:       0.164
 Release:       1mamba
 Summary:       A collection of utilities and DSOs to handle compiled objects
 Group:         Development/Tools
@@ -13,7 +15,7 @@ URL:           htpps://fedorahosted.org/elfutils/
 Source:        https://fedorahosted.org/releases/e/l/elfutils/%{version}/elfutils-%{version}.tar.bz2
 # NOTE: manual intervetion needed for updates, upstream files don't have version in name
 Patch1:        https://fedorahosted.org/releases/e/l/elfutils/%{version}/elfutils-0.158-robustify.patch
-Patch2:        https://fedorahosted.org/releases/e/l/elfutils/%{version}/elfutils-portability-%{version}.patch
+Patch2:        https://fedorahosted.org/releases/e/l/elfutils/%{portability_version}/elfutils-portability-%{portability_version}.patch
 Patch3:        %{name}-0.131-strip-copy-symtab.patch
 Patch4:        %{name}-0.131-gcc43.patch
 Patch5:        %{name}-0.131-off64_t.patch
@@ -82,7 +84,7 @@ libdw provides access to DWARF debug information stored inside ELF files.
 %prep
 %setup -q
 #%patch3 -p1
-%patch2 -p1
+#%patch2 -p1
 #%patch1 -p1
 #%patch5 -p1
 #sed -i "s|-Werror||" src/Makefile.in tests/Makefile.in libelf/Makefile.in
@@ -181,6 +183,9 @@ rm -f %{buildroot}%{_libdir}/libasm.{a,so,so.*}
 %{_libdir}/libelf.so
 
 %changelog
+* Sun Nov 29 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 0.164-1mamba
+- update to 0.164
+
 * Sun Aug 02 2015 Automatic Build System <autodist@mambasoft.it> 0.163-1mamba
 - automatic version update by autodist