diff --git a/cgi.d b/cgi.d
index f0d5e9b..0497eb2 100644
--- a/cgi.d
+++ b/cgi.d
@@ -6026,7 +6026,7 @@ Socket startListening(string host, ushort port, ref bool tcp, ref void delegate(
 		cloexec(listener);
 		listener.setOption(SocketOptionLevel.SOCKET, SocketOption.REUSEADDR, true);
 		if(address.addressFamily == AddressFamily.INET6)
-			listener.setOption(SocketOptionLevel.SOCKET, SocketOption.IPV6_V6ONLY, true);
+			listener.setOption(SocketOptionLevel.IPV6, SocketOption.IPV6_V6ONLY, true);
 		listener.bind(address);
 		cleanup = delegate() {
 			listener.close();
diff --git a/core.d b/core.d
index 5d32925..49af24d 100644
--- a/core.d
+++ b/core.d
@@ -3139,7 +3139,7 @@ class AsyncSocket : AsyncFile {
 
 		if(address.domain == AF_INET6) {
 			int opt = 1;
-			setsockopt(handle, SOL_SOCKET, IPV6_V6ONLY, &opt, opt.sizeof);
+			setsockopt(handle, IPPROTO_IPV6 /*SOL_IPV6*/, IPV6_V6ONLY, &opt, opt.sizeof);
 		}
 
 		// FIXME: chekc for broadcast