diff --git a/aggregate-configure-c99.patch b/aggregate-configure-c99.patch
new file mode 100644
index 0000000..8551b50
--- /dev/null
+++ b/aggregate-configure-c99.patch
@@ -0,0 +1,13 @@
+diff --git a/configure b/configure
+index 57591f2..2f440f0 100755
+--- a/configure
++++ b/configure
+@@ -652,7 +652,7 @@ cat > conftest.$ac_ext << EOF
+ #line 653 "configure"
+ #include "confdefs.h"
+ 
+-main(){return(0);}
++int main(){return(0);}
+ EOF
+ if { (eval echo configure:658: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+   ac_cv_prog_cc_works=yes
diff --git a/aggregate.spec b/aggregate.spec
index a5a5ae2..898e0e2 100644
--- a/aggregate.spec
+++ b/aggregate.spec
@@ -1,15 +1,17 @@
 Name:           aggregate
 Version:        1.6
-Release:        18%{?dist}
+Release:        34%{?dist}
 Summary:        IPv4 CIDR prefix aggregator
 
 License:        ISC
 URL:            http://ftp.isc.org/isc/aggregate/
 Source0:        http://ftp.isc.org/isc/aggregate/aggregate-%{version}.tar.gz
 Patch0:         aggregate-fedora.patch
+Patch1:         aggregate-configure-c99.patch
 
 BuildRequires:         gcc
 BuildRequires:         perl-generators
+BuildRequires: make
 
 %description
 aggregate takes a list of prefixes in conventional format on stdin, 
@@ -27,24 +29,24 @@ aggregate-ios takes Cisco IOS configuration on stdin, and optimizes
 any prefix filters found using aggregate.
 
 %prep
-%setup -q
+%autosetup
 chmod -x LICENSE
-%patch0 -p1 -b .fedora
 
 
 %build
 %configure
-make %{?_smp_mflags}
+%make_build
 
 
 %install
-make install DESTDIR=$RPM_BUILD_ROOT
+%make_install
 
 
 %files
+%doc HISTORY
+%license LICENSE
 %{_bindir}/aggregate
 %{_mandir}/man1/aggregate.1.*
-%doc HISTORY LICENSE
 
 %files ios
 %{_bindir}/aggregate-ios
@@ -52,6 +54,55 @@ make install DESTDIR=$RPM_BUILD_ROOT
 
 
 %changelog
+* Fri Jan 16 2026 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-34
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild
+
+* Wed Jul 23 2025 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-33
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
+
+* Thu Jan 16 2025 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-32
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
+
+* Wed Jul 17 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-31
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild
+
+* Mon Jan 22 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-30
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+* Fri Jan 19 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-29
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+* Wed Jul 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-28
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild
+
+* Fri Jul  7 2023 Yanko Kaneti <yaneti@declera.com> - 1.6-27
+- SPDX migration - ISC is ISC. Modernize a bit
+
+* Wed Jan 18 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-26
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild
+
+* Tue Dec 06 2022 Peter Fordham <peter.fordham@gmail.com> - 1.6-25
+- Port configure script to C99.
+
+* Wed Jul 20 2022 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-24
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild
+
+* Wed Jan 19 2022 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-23
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild
+
+* Wed Jul 21 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-22
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild
+
+* Mon Jan 25 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-21
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
+* Fri Jul 31 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-20
+- Second attempt - Rebuilt for
+  https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
+
+* Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-19
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
+
 * Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.6-18
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild