diff --git a/plotutils.spec b/plotutils.spec
index 2ea7942..c2e654e 100644
--- a/plotutils.spec
+++ b/plotutils.spec
@@ -2,7 +2,7 @@
 
 Name:          plotutils
 Version:       2.6
-Release:       4mamba
+Release:       5mamba
 Summary:       The GNU Plotting Utilities
 Group:         Applications/Graphics
 Vendor:        openmamba
@@ -13,7 +13,7 @@ Source:        ftp://ftp.gnu.org/gnu/plotutils/plotutils-%{version}.tar.gz
 Patch:         %{name}-2.4.1-gcc3.patch
 Patch1:        plotutils-2.6-libpng-1.5-2.patch
 License:       GPL
-PreReq:        %{__install_info}
+Requires(post):%{__install_info}
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 BuildRequires: libgcc
@@ -57,12 +57,14 @@ Requires:      %{libname} = %{?epoch:%epoch:}%{version}-%{release}
 This package contains the libplot, a powerful C/C++ function library for exporting 2-D vector graphics in many file formats, both vector and raster.
 It can also do vector graphics animations under the X Window System.
 Libplot is device-independent in the sense that its API does not depend on the type of graphics file to be exported.
+This package contains static libraries and header files needed for development.
 
-This package contains static libraries and header files need for development.
+%debug_package
 
 %prep
 %setup -q
 %patch1 -p0
+sed -i "s,| arm-\*  |,| aarch64-\* | arm-\*  |," config.sub
 
 %build
 %configure --enable-libplotter --enable-libxmi
@@ -126,13 +128,13 @@ exit 0
 %{_mandir}/man1/plotfont.*
 %{_mandir}/man1/spline.*
 %{_mandir}/man1/tek2plot.*
-%doc AUTHORS COPYING NEWS README THANKS TODO
 
 %files -n %{libname}
 %defattr(-,root,root)
 %{_libdir}/libplot.so.*
 %{_libdir}/libplotter.so.*
 %{_libdir}/libxmi.so.*
+%doc AUTHORS COPYING
 
 %files -n %{libname}-devel
 %defattr(-,root,root)
@@ -149,8 +151,12 @@ exit 0
 %{_libdir}/libxmi.a
 %{_libdir}/libxmi.la
 %{_libdir}/libxmi.so
+%doc NEWS README THANKS TODO
 
 %changelog
+* Sun Dec 06 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 2.6-5mamba
+- rebuilt with debug package and aarch64 build fix
+
 * Thu Dec 13 2012 Silvan Calarco <silvan.calarco@mambasoft.it> 2.6-4mamba
 - rebuilt against libpng 1.5 (patch added)