Index: /trunk/include/iprt/nt/nt.h
===================================================================
--- /trunk/include/iprt/nt/nt.h	(revision 78487)
+++ /trunk/include/iprt/nt/nt.h	(revision 78488)
@@ -2146,4 +2146,5 @@
 } FILE_DISPOSITION_INFORMATION_EX;
 typedef FILE_DISPOSITION_INFORMATION_EX *PFILE_DISPOSITION_INFORMATION_EX;
+# ifndef QUERY_STORAGE_CLASSES_FLAGS_MEASURE_WRITE
 typedef struct _FILE_DESIRED_STORAGE_CLASS_INFORMATION
 {
@@ -2152,4 +2153,5 @@
 } FILE_DESIRED_STORAGE_CLASS_INFORMATION;
 typedef FILE_DESIRED_STORAGE_CLASS_INFORMATION *PFILE_DESIRED_STORAGE_CLASS_INFORMATION;
+# endif
 typedef struct _FILE_STAT_INFORMATION
 {