diff --git a/src/core/udp.c b/src/core/udp.c
index eb64affa..7456f9b0 100644
--- a/src/core/udp.c
+++ b/src/core/udp.c
@@ -61,7 +61,7 @@
 
 /* The list of UDP PCBs */
 #if LWIP_UDP
-/* was static, but we may want to access this from a socket layer */
+/* exported in udp.h (was static) */
 struct udp_pcb *udp_pcbs = NULL;
 
 static struct udp_pcb *pcb_cache = NULL;
diff --git a/src/include/lwip/udp.h b/src/include/lwip/udp.h
index ede04745..346898e8 100644
--- a/src/include/lwip/udp.h
+++ b/src/include/lwip/udp.h
@@ -68,6 +68,8 @@ struct udp_pcb {
     struct ip_addr *addr, u16_t port);
   void *recv_arg;  
 };
+/* udp_pcbs export for exernal reference (e.g. SNMP agent) */
+extern struct udp_pcb *udp_pcbs;
 
 /* The following functions is the application layer interface to the
    UDP code. */