diff --git a/src/add-ons/kernel/busses/usb/uhci.cpp b/src/add-ons/kernel/busses/usb/uhci.cpp
index 56225afdba..5c805fac1a 100644
--- a/src/add-ons/kernel/busses/usb/uhci.cpp
+++ b/src/add-ons/kernel/busses/usb/uhci.cpp
@@ -399,6 +399,9 @@ UHCI::UHCI(pci_info *info, Stack *stack)
 		fRootHubAddress(0),
 		fPortResetChange(0)
 {
+	// Create a lock for the isochronous transfer list
+	mutex_init(&fIsochronousLock, "UHCI isochronous lock");
+
 	if (!fInitOK) {
 		TRACE_ERROR("bus manager failed to init\n");
 		return;
@@ -533,9 +536,6 @@ UHCI::UHCI(pci_info *info, Stack *stack)
 		"uhci cleanup thread", B_NORMAL_PRIORITY, (void *)this);
 	resume_thread(fCleanupThread);
 
-	// Create a lock for the isochronous transfer list
-	mutex_init(&fIsochronousLock, "UHCI isochronous lock");
-
 	// Create semaphore the isochronous finisher thread will wait for
 	fFinishIsochronousTransfersSem = create_sem(0,
 		"UHCI Isochronous Finish Transfers");