diff --git a/reactos/ntoskrnl/include/internal/mm.h b/reactos/ntoskrnl/include/internal/mm.h
index fb03b7d0ead..55c90fd5f73 100644
--- a/reactos/ntoskrnl/include/internal/mm.h
+++ b/reactos/ntoskrnl/include/internal/mm.h
@@ -1583,6 +1583,12 @@ MmAllocateSection(
     PVOID BaseAddress
 );
 
+VOID
+NTAPI
+MmFreeSection(
+    PVOID BaseAddress
+);
+
 NTSTATUS
 NTAPI
 MmQuerySectionView(