diff --git a/src/modules/mavlink/mavlink_main.cpp b/src/modules/mavlink/mavlink_main.cpp
index 3cea61845ed..0d76e299c3c 100644
--- a/src/modules/mavlink/mavlink_main.cpp
+++ b/src/modules/mavlink/mavlink_main.cpp
@@ -941,7 +941,7 @@ Mavlink::find_broadcast_address()
 	struct ifconf ifconf;
 	int ret;
 
-#if defined(__APPLE__) && defined(__MACH__)
+#if defined(__APPLE__) && defined(__MACH__) || defined(__CYGWIN__)
 	// On Mac, we can't determine the required buffer
 	// size in advance, so we just use what tends to work.
 	ifconf.ifc_len = 1024;