diff --git a/src/ipv6.cpp b/src/ipv6.cpp
index 78c68240..416065b9 100644
--- a/src/ipv6.cpp
+++ b/src/ipv6.cpp
@@ -32,6 +32,9 @@
     #include <netinet/in.h>
     #include <sys/socket.h>
 #else
+    #ifndef WIN32_LEAN_AND_MEAN
+    #define WIN32_LEAN_AND_MEAN
+    #endif
     #include <ws2tcpip.h>
 #endif
 #include <tins/ipv6.h>