diff --git a/net-snmp-5.9.1-autoconf.patch b/net-snmp-5.9.1-autoconf.patch
new file mode 100644
index 0000000..5c6b2a9
--- /dev/null
+++ b/net-snmp-5.9.1-autoconf.patch
@@ -0,0 +1,6 @@
+diff -urNp a/dist/autoconf-version b/dist/autoconf-version
+--- a/dist/autoconf-version	2021-09-01 11:18:14.582110773 +0200
++++ b/dist/autoconf-version	2021-09-01 11:20:16.804369533 +0200
+@@ -1 +1 @@
+-2.69
++2.71
diff --git a/net-snmp.spec b/net-snmp.spec
index 1a55f78..e97c61b 100644
--- a/net-snmp.spec
+++ b/net-snmp.spec
@@ -10,7 +10,7 @@
 Summary:    A collection of SNMP protocol tools and libraries
 Name:       net-snmp
 Version:    5.9.1
-Release:    7%{?dist}
+Release:    8%{?dist}
 Epoch:      1
 
 License:    BSD
@@ -51,6 +51,8 @@ Patch21:    net-snmp-5.8-clientaddr-error-message.patch
 Patch22:    net-snmp-5.9-ECC-cert.patch
 Patch23:    net-snmp-5.9-intermediate-certs.patch
 Patch24:    net-snmp-5.9.1-remove-des.patch
+Patch25:    net-snmp-5.9.1-autoconf.patch
+
 # Modern RPM API means at least EL6
 Patch101:   net-snmp-5.8-modern-rpm-api.patch
 
@@ -227,6 +229,7 @@ cp %{SOURCE10} .
 %patch22 -p1 -b .ECC-cert
 %patch23 -p1 -b .intermediate-certs
 %patch24 -p1 -b .remove-des
+%patch25 -p1 -b .autoconf
 
 %patch101 -p1 -b .modern-rpm-api
 %patch102 -p1
@@ -496,6 +499,9 @@ LD_LIBRARY_PATH=%{buildroot}/%{_libdir} make test
 %{_libdir}/libnetsnmptrapd*.so.%{soname}*
 
 %changelog
+* Wed Sep 01 2021 Josef Ridky <jridky@redhat.com> - 1:5.9.1-8
+- fix FTBFS (#1999475)
+
 * Thu Jul 29 2021 Josef Ridky <jridky@redhat.com> - 1:5.9.1-7
 - revert cflags modification in net-snmp-config as was reverted in upstream
   and add proper dependency to net-snmp-devel sub-package (#1544527)