diff --git a/reactos/ntoskrnl/cache/section/data.c b/reactos/ntoskrnl/cache/section/data.c
index 36662961461..b496b57acea 100644
--- a/reactos/ntoskrnl/cache/section/data.c
+++ b/reactos/ntoskrnl/cache/section/data.c
@@ -819,8 +819,12 @@ MmUnmapViewOfCacheSegment(PMMSUPPORT AddressSpace,
            MmGetAddressSpaceOwner(AddressSpace),
            MemoryArea->StartingAddress);
 
+    MmLockAddressSpace(AddressSpace);
+
     MmFreeMemoryArea(AddressSpace, MemoryArea, MmFreeCacheSectionPage, Context);
 
+    MmUnlockAddressSpace(AddressSpace);
+
     MmUnlockSectionSegment(Segment);
 
     DPRINTC("MiUnmapViewOfSegment %p %p %p\n",