diff --git a/miniupnpc/miniupnpc.c b/miniupnpc/miniupnpc.c
index 5c191c5..95504b1 100644
--- a/miniupnpc/miniupnpc.c
+++ b/miniupnpc/miniupnpc.c
@@ -71,6 +71,17 @@
 #define TIMEVAL struct timeval
 #endif
 
+
+#if defined(HAS_IP_MREQN) && defined(NEED_STRUCT_IP_MREQN)
+/* Several versions of glibc don't define this structure, define it here and compile with CFLAGS NEED_STRUCT_IP_MREQN */
+struct ip_mreqn
+{
+	struct in_addr	imr_multiaddr;		/* IP multicast address of group */
+	struct in_addr	imr_address;		/* local IP address of interface */
+	int		imr_ifindex;		/* Interface index */
+};
+#endif
+
 #include "miniupnpc.h"
 #include "minissdpc.h"
 #include "miniwget.h"