diff --git a/README.md b/README.md
index 9d9a590..734ef3a 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,10 @@ The options are as follows:
 	> try to aggregate generated filters as much as possible (not all
     output formats supported).
 
+-    -b
+
+	> generate output in BIRD format (default: Cisco).
+
 -    -d      
 
 	> enable some debugging output.
diff --git a/bgpq3.8 b/bgpq3.8
index cca6624..bdbcc36 100644
--- a/bgpq3.8
+++ b/bgpq3.8
@@ -60,6 +60,8 @@ generate IPv6 prefix/access-lists (IPv4 by default).
 .It Fl A
 try to aggregate prefix-lists as much as possible (not all output
 formats supported).
+.It Fl b
+generate output in BIRD format (default: Cisco).
 .It Fl d
 enable some debugging output.
 .It Fl D
diff --git a/bgpq3.c b/bgpq3.c
index 34eccd8..d27f8fb 100644
--- a/bgpq3.c
+++ b/bgpq3.c
@@ -24,12 +24,13 @@ int
 usage(int ecode)
 { 
 	printf("\nUsage: bgpq3 [-h host] [-S sources] [-P|E|G <num>|f <num>]"
-		" [-346ADJjXd] [-R len] <OBJECTS>...\n");
+		" [-346AbDJjXd] [-R len] <OBJECTS>...\n");
 	printf(" -3        : assume that your device is asn32-safe\n"); 
 	printf(" -4        : generate IPv4 prefix-lists (default)\n"); 
 	printf(" -6        : generate IPv6 prefix-lists (IPv4 by default)\n");
 	printf(" -A        : try to aggregate Cisco prefix-lists or Juniper "
 			"route-filters\n             as much as possible\n");
+	printf(" -b        : generate BIRD output (Cisco IOS by default)\n");
 	printf(" -d        : generate some debugging output\n");
 	printf(" -D        : use asdot notation in as-path\n");
 	printf(" -E        : generate extended access-list(Cisco) or "
@@ -69,8 +70,8 @@ exclusive()
 void
 vendor_exclusive()
 { 
-	fprintf(stderr, "-J (JunOS), -j (JSON) and -X (IOS XR) options are mutually"
-		" exclusive\n");
+	fprintf(stderr, "-b (BIRD), -J (JunOS), -j (JSON) and -X (IOS XR) options are "
+		"mutually exclusive\n");
 	exit(1);
 };
 
@@ -121,7 +122,7 @@ main(int argc, char* argv[])
 	bgpq_expander_init(&expander,af);
 	expander.sources=getenv("IRRD_SOURCES");
 
-	while((c=getopt(argc,argv,"346AdDES:jJf:l:m:M:W:Pr:R:G:Th:X"))!=EOF) { 
+	while((c=getopt(argc,argv,"346AbdDES:jJf:l:m:M:W:Pr:R:G:Th:X"))!=EOF) {
 	switch(c) { 
 		case '3': 
 			expander.asn32=1;
@@ -147,6 +148,9 @@ main(int argc, char* argv[])
 			if(aggregate) debug_aggregation++;
 			aggregate=1;
 			break;
+        case 'b': if(expander.vendor) vendor_exclusive();
+			expander.vendor=V_BIRD;
+			break;
 		case 'd': debug_expander++;
 			break;
 		case 'D': expander.asdot=1;
@@ -268,9 +272,13 @@ main(int argc, char* argv[])
 		expander.generation=T_PREFIXLIST;
 	};
 
-	if(expander.vendor==V_CISCO_XR && expander.generation!=T_PREFIXLIST) { 
+	if(expander.vendor==V_CISCO_XR && expander.generation!=T_PREFIXLIST) {
 		sx_report(SX_FATAL, "Sorry, only prefix-sets supported for IOS XR\n");
 	};
+	if(expander.vendor==V_BIRD && expander.generation!=T_PREFIXLIST) {
+		sx_report(SX_FATAL, "Sorry, only prefix-lists supported for BIRD "
+			"output\n");
+	};
 	if(expander.vendor==V_JSON && expander.generation!=T_PREFIXLIST) { 
 		sx_report(SX_FATAL, "Sorry, only prefix-lists supported for JSON "
 			"output\n");
diff --git a/bgpq3.h b/bgpq3.h
index 2967e55..68d10c4 100644
--- a/bgpq3.h
+++ b/bgpq3.h
@@ -8,7 +8,8 @@ typedef enum {
 	V_CISCO = 0,
 	V_JUNIPER,
 	V_CISCO_XR,
-	V_JSON
+	V_JSON,
+	V_BIRD
 } bgpq_vendor_t;
 
 typedef enum { 
diff --git a/bgpq3_printer.c b/bgpq3_printer.c
index ebf2720..ea1bd35 100644
--- a/bgpq3_printer.c
+++ b/bgpq3_printer.c
@@ -270,6 +270,32 @@ checkSon:
 		bgpq3_print_json_prefix(n->son, ff);
 };
 
+void
+bgpq3_print_bird_prefix(struct sx_radix_node* n, void* ff)
+{
+	char prefix[128];
+	FILE* f=(FILE*)ff;
+	if(n->isGlue)
+		goto checkSon;
+	if(!f)
+		f=stdout;
+	sx_prefix_snprintf(&n->prefix, prefix, sizeof(prefix));
+	if (!n->isAggregate) {
+		fprintf(f, "%s\n    %s",
+			needscomma?",":"", prefix);
+	} else if (n->aggregateLow > n->prefix.masklen) {
+		fprintf(f, "%s\n    %s{%u,%u}",
+			needscomma?",":"", prefix, n->aggregateLow, n->aggregateHi);
+	} else {
+		fprintf(f, "%s\n    %s{%u,%u}",
+			needscomma?",":"", prefix, n->prefix.masklen, n->aggregateHi);
+	};
+	needscomma=1;
+checkSon:
+	if(n->son)
+		bgpq3_print_bird_prefix(n->son, ff);
+};
+
 void
 bgpq3_print_jrfilter(struct sx_radix_node* n, void* ff)
 { 
@@ -479,6 +505,16 @@ bgpq3_print_json_prefixlist(FILE* f, struct bgpq_expander* b)
 	return 0;
 };
 
+int
+bgpq3_print_bird_prefixlist(FILE* f, struct bgpq_expander* b)
+{
+	fprintf(f,"%s = [",
+		b->name?b->name:"NN");
+	sx_radix_tree_foreach(b->tree,bgpq3_print_bird_prefix,f);
+	fprintf(f,"\n];\n");
+	return 0;
+};
+
 int
 bgpq3_print_cisco_eacl(FILE* f, struct bgpq_expander* b)
 { 
@@ -497,6 +533,7 @@ bgpq3_print_prefixlist(FILE* f, struct bgpq_expander* b)
 		case V_CISCO: return bgpq3_print_cisco_prefixlist(f,b);
 		case V_CISCO_XR: return bgpq3_print_ciscoxr_prefixlist(f,b);
 		case V_JSON: return bgpq3_print_json_prefixlist(f,b);
+		case V_BIRD: return bgpq3_print_bird_prefixlist(f,b);
 	};
 	return 0;
 };
@@ -509,6 +546,7 @@ bgpq3_print_eacl(FILE* f, struct bgpq_expander* b)
 		case V_CISCO: return bgpq3_print_cisco_eacl(f,b);
 		case V_CISCO_XR: sx_report(SX_FATAL, "unreachable point\n");
 		case V_JSON: sx_report(SX_FATAL, "unreachable point\n");
+		case V_BIRD: sx_report(SX_FATAL, "unreachable point\n");
 	};
 	return 0;
 };