diff --git a/0006-ospf-api.patch b/0006-ospf-api.patch
new file mode 100644
index 0000000..bd5bbcb
--- /dev/null
+++ b/0006-ospf-api.patch
@@ -0,0 +1,25 @@
+diff --git a/ospfd/ospf_spf.c b/ospfd/ospf_spf.c
+index 74a5674..aec9037 100644
+--- a/ospfd/ospf_spf.c
++++ b/ospfd/ospf_spf.c
+@@ -48,7 +48,10 @@
+ #include "ospfd/ospf_sr.h"
+ #include "ospfd/ospf_ti_lfa.h"
+ #include "ospfd/ospf_errors.h"
++
++#ifdef SUPPORT_OSPF_API
+ #include "ospfd/ospf_apiserver.h"
++#endif
+ 
+ /* Variables to ensure a SPF scheduled log message is printed only once */
+ 
+@@ -1897,7 +1900,9 @@ static void ospf_spf_calculate_schedule_worker(struct thread *thread)
+ 	/* Update all routers routing table */
+ 	ospf->oall_rtrs = ospf->all_rtrs;
+ 	ospf->all_rtrs = all_rtrs;
++#ifdef SUPPORT_OSPF_API
+ 	ospf_apiserver_notify_reachable(ospf->oall_rtrs, ospf->all_rtrs);
++#endif
+ 
+ 	/* Free old ABR/ASBR routing table */
+ 	if (ospf->old_rtrs)