Index: uspace/lib/usb/src/pipesio.c
===================================================================
--- uspace/lib/usb/src/pipesio.c	(revision c6394aab5f25d8aa4ee43579066a790a983ee510)
+++ uspace/lib/usb/src/pipesio.c	(revision b79c31f91eff5817406e917fc32db7c34f6c24ac)
@@ -85,8 +85,7 @@
 	 * Make call identifying target USB device and type of transfer.
 	 */
-	aid_t opening_request = async_send_4(pipe->hc_phone,
+	aid_t opening_request = async_send_3(pipe->hc_phone,
 	    DEV_IFACE_ID(USBHC_DEV_IFACE), ipc_method,
 	    pipe->wire->address, pipe->endpoint_no,
-	    pipe->max_packet_size,
 	    NULL);
 	if (opening_request == 0) {
@@ -232,8 +231,7 @@
 	 * Make call identifying target USB device and type of transfer.
 	 */
-	aid_t opening_request = async_send_4(pipe->hc_phone,
+	aid_t opening_request = async_send_3(pipe->hc_phone,
 	    DEV_IFACE_ID(USBHC_DEV_IFACE), ipc_method,
 	    pipe->wire->address, pipe->endpoint_no,
-	    pipe->max_packet_size,
 	    NULL);
 	if (opening_request == 0) {
@@ -331,8 +329,7 @@
 	 * Make call identifying target USB device and control transfer type.
 	 */
-	aid_t opening_request = async_send_4(pipe->hc_phone,
+	aid_t opening_request = async_send_3(pipe->hc_phone,
 	    DEV_IFACE_ID(USBHC_DEV_IFACE), IPC_M_USBHC_CONTROL_READ,
 	    pipe->wire->address, pipe->endpoint_no,
-	    pipe->max_packet_size,
 	    NULL);
 	if (opening_request == 0) {
@@ -473,9 +470,8 @@
 	 * Make call identifying target USB device and control transfer type.
 	 */
-	aid_t opening_request = async_send_5(pipe->hc_phone,
+	aid_t opening_request = async_send_4(pipe->hc_phone,
 	    DEV_IFACE_ID(USBHC_DEV_IFACE), IPC_M_USBHC_CONTROL_WRITE,
 	    pipe->wire->address, pipe->endpoint_no,
 	    data_buffer_size,
-	    pipe->max_packet_size,
 	    NULL);
 	if (opening_request == 0) {