diff --git a/drivers/usb/usbohci/hardware.cpp b/drivers/usb/usbohci/hardware.cpp
index 0636a38493f..8d8de6434a0 100644
--- a/drivers/usb/usbohci/hardware.cpp
+++ b/drivers/usb/usbohci/hardware.cpp
@@ -883,6 +883,14 @@ CUSBHardwareDevice::StopController(void)
     ULONG Control, Reset, Status;
     ULONG Index, FrameInterval;
 
+    //
+    // alignment check
+    //
+    WRITE_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_HCCA_OFFSET, 0xFFFFFFFF);
+    Control = READ_REGISTER_ULONG((PULONG)((PUCHAR)m_Base + OHCI_HCCA_OFFSET));
+    DPRINT1("HcHCCA Alignment %x\n", Control);
+    ASSERT((Control & 0xFFFFFFF0) == 0xFFFFFFF0);
+
     //
     // check context
     //