diff --git a/src/add-ons/kernel/busses/usb/ehci.cpp b/src/add-ons/kernel/busses/usb/ehci.cpp
index 3df536339f..8069756526 100644
--- a/src/add-ons/kernel/busses/usb/ehci.cpp
+++ b/src/add-ons/kernel/busses/usb/ehci.cpp
@@ -1089,11 +1089,10 @@ EHCI::FinishTransfers()
 							transfer->data_descriptor,
 							vector, vectorCount,
 							&nextDataToggle);
-					} else {
+					} else if (transfer->data_descriptor) {
 						// calculate transfered length
 						actualLength = ReadActualLength(
-							(ehci_qtd *)transfer->queue_head->element_log,
-							&nextDataToggle);
+							transfer->data_descriptor, &nextDataToggle);
 					}
 
 					transfer->transfer->TransferPipe()->SetDataToggle(nextDataToggle);
diff --git a/src/add-ons/kernel/busses/usb/ohci.cpp b/src/add-ons/kernel/busses/usb/ohci.cpp
index ede5d50574..f580f721c9 100644
--- a/src/add-ons/kernel/busses/usb/ohci.cpp
+++ b/src/add-ons/kernel/busses/usb/ohci.cpp
@@ -1029,10 +1029,10 @@ OHCI::_FinishTransfers()
 						actualLength = _ReadDescriptorChain(
 							transfer->data_descriptor,
 							vector, vectorCount);
-					} else {
+					} else if (transfer->data_descriptor) {
 						// read the actual length that was sent
 						actualLength = _ReadActualLength(
-							transfer->first_descriptor);
+							transfer->data_descriptor);
 					}
 
 					if (transfer->transfer->IsFragmented()) {
diff --git a/src/add-ons/kernel/busses/usb/uhci.cpp b/src/add-ons/kernel/busses/usb/uhci.cpp
index 119e4998bb..75d380d237 100644
--- a/src/add-ons/kernel/busses/usb/uhci.cpp
+++ b/src/add-ons/kernel/busses/usb/uhci.cpp
@@ -1225,10 +1225,10 @@ UHCI::FinishTransfers()
 							transfer->data_descriptor,
 							vector, vectorCount,
 							&lastDataToggle);
-					} else {
+					} else if (transfer->data_descriptor) {
 						// read the actual length that was sent
 						actualLength = ReadActualLength(
-							transfer->first_descriptor, &lastDataToggle);
+							transfer->data_descriptor, &lastDataToggle);
 					}
 
 					transfer->transfer->TransferPipe()->SetDataToggle(lastDataToggle == 0);