diff --git a/include/apr_network_io.h b/include/apr_network_io.h
index 0d34a84..d322bd3 100644
--- a/include/apr_network_io.h
+++ b/include/apr_network_io.h
@@ -101,6 +101,9 @@ extern "C" {
                                     */
 #define APR_SO_BROADCAST     65536 /**< Allow broadcast
                                     */
+#define APR_FREEBIND        131072 /**< Allow binding to addresses not owned
+                                    * by any interface
+                                    */
 
 /** @} */
 
diff --git a/network_io/unix/sockopt.c b/network_io/unix/sockopt.c
index 6ce4b91..a343a2b 100644
--- a/network_io/unix/sockopt.c
+++ b/network_io/unix/sockopt.c
@@ -330,6 +330,17 @@ apr_status_t apr_socket_opt_set(apr_socket_t *sock,
         return APR_ENOTIMPL;
 #endif
         break;
+    case APR_FREEBIND:
+#ifdef IP_FREEBIND
+        if (setsockopt(sock->socketdes, SOL_IP, IP_FREEBIND,
+                       (void *)&one, sizeof(int)) == -1) {
+            return errno;
+        }
+        apr_set_option(sock, APR_FREEBIND, on);
+#else
+        return APR_ENOTIMPL;
+#endif
+        break;
     default:
         return APR_EINVAL;
     }