Index: uspace/lib/c/include/ipc/socket.h
===================================================================
--- uspace/lib/c/include/ipc/socket.h	(revision 758f8d55da31118ef5accb99051c4f46cc5c880a)
+++ uspace/lib/c/include/ipc/socket.h	(revision 11d41be553e41d17d2cb5ea5f86b7adbf2c37ba4)
@@ -198,5 +198,5 @@
 #define SOCKET_GET_OPT_NAME(call) \
 	({ \
-		int opt_name = (int) IPC_GET_ARG4(call); \
+		int opt_name = (int) IPC_GET_ARG2(call); \
 		opt_name; \
 	})