diff --git a/reactos/ntoskrnl/mm/mminit.c b/reactos/ntoskrnl/mm/mminit.c
index 6a3492415c0..8a9fd4297c3 100644
--- a/reactos/ntoskrnl/mm/mminit.c
+++ b/reactos/ntoskrnl/mm/mminit.c
@@ -48,7 +48,7 @@ MemType[] =
     "LoaderXIPRom      "
 };
 
-PBOOLEAN Mm64BitPhysicalAddress = FALSE;
+BOOLEAN Mm64BitPhysicalAddress = FALSE;
 ULONG MmReadClusterSize;
 //
 // 0 | 1 is on/off paging, 2 is undocumented