diff --git a/0007-ospf-opaque-lsa.patch b/0007-ospf-opaque-lsa.patch
new file mode 100644
index 0000000..96cc069
--- /dev/null
+++ b/0007-ospf-opaque-lsa.patch
@@ -0,0 +1,28 @@
+From 57e4c21583a9fa4c9d34fa8263930c3a1d5c6cd9 Mon Sep 17 00:00:00 2001
+From: Igor Ryzhov <iryzhov@nfware.com>
+Date: Tue, 31 Aug 2021 13:41:40 +0300
+Subject: [PATCH] ospfd: correctly cleanup spf data
+
+ospf_spf_cleanup frees the data so we need to reset the stale pointers.
+
+Fixes #9523.
+
+Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
+---
+ ospfd/ospf_spf.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/ospfd/ospf_spf.c b/ospfd/ospf_spf.c
+index 6a51440266e..8b4d55984c8 100644
+--- a/ospfd/ospf_spf.c
++++ b/ospfd/ospf_spf.c
+@@ -1781,6 +1781,9 @@ void ospf_spf_calculate_area(struct ospf *ospf, struct ospf_area *area,
+ 				    ospf->ti_lfa_protection_type);
+ 
+ 	ospf_spf_cleanup(area->spf, area->spf_vertex_list);
++
++	area->spf = NULL;
++	area->spf_vertex_list = NULL;
+ }
+ 
+ void ospf_spf_calculate_areas(struct ospf *ospf, struct route_table *new_table,
diff --git a/frr.spec b/frr.spec
index 81c4c25..d63b78c 100644
--- a/frr.spec
+++ b/frr.spec
@@ -5,7 +5,7 @@
 
 Name: frr
 Version: 8.0
-Release: 3%{?checkout}%{?dist}
+Release: 4%{?checkout}%{?dist}
 Summary: Routing daemon
 License: GPLv2+
 URL: http://www.frrouting.org
@@ -59,6 +59,7 @@ Patch0005: 0005-use-python3.patch
 #Adding a patch from frr after rebase
 #We would have hit this surely later, better apply the patch now
 Patch0006: 0006-prefix-list-duplication.patch
+Patch0007: 0007-ospf-opaque-lsa.patch
 
 %description
 FRRouting is free software that manages TCP/IP based routing protocols. It takes
@@ -210,6 +211,9 @@ make check PYTHON=%{__python3}
 %{_tmpfilesdir}/%{name}.conf
 
 %changelog
+* Wed Sep 01 2021 Michal Ruprich <mruprich@redhat.com> - 8.0-4
+- Resolves: #1997603 - ospfd not running with ospf opaque-lsa option used
+
 * Mon Aug 16 2021 Michal Ruprich <mruprich@redhat.com> - 8.0-3
 - Related: #1990858 - Fixing prefix-list duplication check