diff --git a/reactos/ntoskrnl/fs/mcb.c b/reactos/ntoskrnl/fs/mcb.c
index abc255d4917..dd3794c5985 100644
--- a/reactos/ntoskrnl/fs/mcb.c
+++ b/reactos/ntoskrnl/fs/mcb.c
@@ -262,7 +262,7 @@ FsRtlNumberOfRunsInLargeMcb(IN PLARGE_MCB Mcb)
 {
   ULONG NumberOfRuns;
   ExAcquireFastMutex (Mcb->FastMutex);
-  NumberOfRuns=Mcb->BaseMcb.MaximumPairCount;
+  NumberOfRuns=Mcb->PairCount;
   ExReleaseFastMutex (Mcb->FastMutex);
   return(NumberOfRuns);
 }