Index: uspace/lib/c/include/ipc/dev_iface.h
===================================================================
--- uspace/lib/c/include/ipc/dev_iface.h	(revision 4805495a910f793f8918c13f029a38a5bb548154)
+++ uspace/lib/c/include/ipc/dev_iface.h	(revision 9eea0b783493decf0abf11e5aa37be12b86e7706)
@@ -91,8 +91,8 @@
  */
 
-#define DEV_IPC_GET_ARG1(call) IPC_GET_ARG2((call))
-#define DEV_IPC_GET_ARG2(call) IPC_GET_ARG3((call))
-#define DEV_IPC_GET_ARG3(call) IPC_GET_ARG4((call))
-#define DEV_IPC_GET_ARG4(call) IPC_GET_ARG5((call))
+#define DEV_IPC_GET_ARG1(call) ipc_get_arg2(&(call))
+#define DEV_IPC_GET_ARG2(call) ipc_get_arg3(&(call))
+#define DEV_IPC_GET_ARG3(call) ipc_get_arg4(&(call))
+#define DEV_IPC_GET_ARG4(call) ipc_get_arg5(&(call))
 
 #endif