Index: /trunk/src/VBox/Devices/Bus/DevIommuIntel.cpp
===================================================================
--- /trunk/src/VBox/Devices/Bus/DevIommuIntel.cpp	(revision 88536)
+++ /trunk/src/VBox/Devices/Bus/DevIommuIntel.cpp	(revision 88537)
@@ -702,6 +702,6 @@
         uint16_t const offQueueTail = VTD_IQT_REG_GET_QT(uIqtReg);
         uint64_t const uIqaReg      = dmarRegRead64(pThis, VTD_MMIO_OFF_IQA_REG);
-        uint8_t const  uDw          = RT_BF_GET(uIqaReg, VTD_BF_IQA_REG_DW);
-        if (   uDw != VTD_IQA_REG_DW_256_BIT
+        uint8_t const  fDw          = RT_BF_GET(uIqaReg, VTD_BF_IQA_REG_DW);
+        if (   fDw != VTD_IQA_REG_DW_256_BIT
             || !(offQueueTail & 0x1f))
         {