Index: uspace/lib/c/include/ipc/socket.h
===================================================================
--- uspace/lib/c/include/ipc/socket.h	(revision c8916d15d0b9a3ebcb74f63bfddee2a2188663df)
+++ uspace/lib/c/include/ipc/socket.h	(revision a159c6aa377c6c5d7c19e1b0e116eb0ae7d48502)
@@ -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; \
 	})