Index: uspace/lib/libc/generic/ipc.c
===================================================================
--- uspace/lib/libc/generic/ipc.c	(revision badbd888ca37567fce496cb0f320a8e72e9dee6e)
+++ uspace/lib/libc/generic/ipc.c	(revision 3115355436bd3be893ea7ad92686758cb9124a41)
@@ -736,5 +736,5 @@
 int ipc_data_write_send(int phoneid, void *src, size_t size)
 {
-	return ipc_call_sync_3_0(phoneid, IPC_M_DATA_WRITE, 0, (ipcarg_t) src,
+	return ipc_call_sync_2_0(phoneid, IPC_M_DATA_WRITE, (ipcarg_t) src,
 	    (ipcarg_t) size);
 }
@@ -749,6 +749,4 @@
  * @param callid	Storage where the hash of the IPC_M_DATA_WRITE call will
  * 			be stored.
- * @param dst		Storage where the suggested destination address will
- *			be stored. May be NULL.
  * @param size		Storage where the suggested size will be stored. May be
  *			NULL
@@ -756,5 +754,5 @@
  * @return		Non-zero on success, zero on failure.
  */
-int ipc_data_write_receive(ipc_callid_t *callid, void **dst, size_t *size)
+int ipc_data_write_receive(ipc_callid_t *callid, size_t *size)
 {
 	ipc_call_t data;
@@ -765,8 +763,6 @@
 	if (IPC_GET_METHOD(data) != IPC_M_DATA_WRITE)
 		return 0;
-	if (dst)
-		*dst = (void *) IPC_GET_ARG1(data);
 	if (size)
-		*size = (size_t) IPC_GET_ARG3(data);
+		*size = (size_t) IPC_GET_ARG2(data);
 	return 1;
 }
@@ -785,5 +781,5 @@
 int ipc_data_write_deliver(ipc_callid_t callid, void *dst, size_t size)
 {
-	return ipc_answer_3(callid, EOK, (ipcarg_t) dst, 0, (ipcarg_t) size);
+	return ipc_answer_2(callid, EOK, (ipcarg_t) dst, (ipcarg_t) size);
 }
  
Index: uspace/lib/libc/include/ipc/ipc.h
===================================================================
--- uspace/lib/libc/include/ipc/ipc.h	(revision badbd888ca37567fce496cb0f320a8e72e9dee6e)
+++ uspace/lib/libc/include/ipc/ipc.h	(revision 3115355436bd3be893ea7ad92686758cb9124a41)
@@ -267,6 +267,5 @@
 extern int ipc_data_read_deliver(ipc_callid_t callid, void *src, size_t size);
 extern int ipc_data_write_send(int phoneid, void *src, size_t size);
-extern int ipc_data_write_receive(ipc_callid_t *callid, void **dst,
-    size_t *size);
+extern int ipc_data_write_receive(ipc_callid_t *callid, size_t *size);
 extern int ipc_data_write_deliver(ipc_callid_t callid, void *dst, size_t size);