diff --git a/src/add-ons/kernel/bus_managers/usb/Stack.cpp b/src/add-ons/kernel/bus_managers/usb/Stack.cpp
index 734cb115f9..049d6f0c3e 100644
--- a/src/add-ons/kernel/bus_managers/usb/Stack.cpp
+++ b/src/add-ons/kernel/bus_managers/usb/Stack.cpp
@@ -21,6 +21,7 @@ Stack::Stack()
 	:	fExploreThread(-1),
 		fFirstExploreDone(false),
 		fStopThreads(false),
+		fAllocator(NULL),
 		fObjectIndex(1),
 		fObjectMaxCount(1024),
 		fObjectArray(NULL),