diff --git a/src/add-ons/kernel/bus_managers/usb/Transfer.cpp b/src/add-ons/kernel/bus_managers/usb/Transfer.cpp
index 4ec4064600..fd9d013e03 100644
--- a/src/add-ons/kernel/bus_managers/usb/Transfer.cpp
+++ b/src/add-ons/kernel/bus_managers/usb/Transfer.cpp
@@ -126,6 +126,10 @@ Transfer::AdvanceByFragment(size_t actualLength)
 status_t
 Transfer::InitKernelAccess()
 {
+	// nothing to do if we are already prepared
+	if (fClonedArea >= B_OK)
+		return B_OK;
+
 	// we might need to access a buffer in userspace. this will not
 	// be possible in the kernel space finisher thread unless we
 	// get the proper area id for the space we need and then clone it