diff --git a/src/openvpn/mtcp.c b/src/openvpn/mtcp.c
index b7bef46..2eab7b7 100644
--- a/src/openvpn/mtcp.c
+++ b/src/openvpn/mtcp.c
@@ -37,14 +37,6 @@
 #include <sys/inotify.h>
 #endif
 
-struct ta_iow_flags
-{
-    unsigned int flags;
-    unsigned int ret;
-    unsigned int tun;
-    unsigned int sock;
-};
-
 struct multi_instance *
 multi_create_instance_tcp(struct multi_context *m, struct link_socket *sock)
 {
diff --git a/src/openvpn/multi_io.c b/src/openvpn/multi_io.c
index f484fe2..e6f4e9c 100644
--- a/src/openvpn/multi_io.c
+++ b/src/openvpn/multi_io.c
@@ -46,14 +46,6 @@
 #define MULTI_IO_FILE_CLOSE_WRITE ((void *)5)
 #define MULTI_IO_DCO              ((void *)6)
 
-struct ta_iow_flags
-{
-    unsigned int flags;
-    unsigned int ret;
-    unsigned int tun;
-    unsigned int sock;
-};
-
 #ifdef ENABLE_DEBUG
 static const char *
 pract(int action)
diff --git a/src/openvpn/networking_sitnl.c b/src/openvpn/networking_sitnl.c
index b88f03c..baf6f89 100644
--- a/src/openvpn/networking_sitnl.c
+++ b/src/openvpn/networking_sitnl.c
@@ -124,15 +124,6 @@
 typedef int (*sitnl_parse_reply_cb)(struct nlmsghdr *msg, void *arg);
 
 /**
- * Object returned by route request operation
- */
-struct sitnl_route_data_cb
-{
-    unsigned int iface;
-    inet_address_t gw;
-};
-
-/**
  * Helper function used to easily add attributes to a rtnl message
  */
 static int
diff --git a/src/openvpn/route.c b/src/openvpn/route.c
index 1cfbf80..3b18f74 100644
--- a/src/openvpn/route.c
+++ b/src/openvpn/route.c
@@ -3257,12 +3257,6 @@
  * netlink(3), netlink(7), rtnetlink(7)
  * https://www.virtualbox.org/svn/vbox/trunk/src/VBox/NetworkServices/NAT/
  */
-struct rtreq
-{
-    struct nlmsghdr nh;
-    struct rtmsg rtm;
-    char attrbuf[512];
-};
 
 void
 get_default_gateway_ipv6(struct route_ipv6_gateway_info *rgi6, const struct in6_addr *dest,