diff --git a/reactos/ntoskrnl/include/internal/amd64/mm.h b/reactos/ntoskrnl/include/internal/amd64/mm.h
index e78c3ec8193..63f740a2aea 100644
--- a/reactos/ntoskrnl/include/internal/amd64/mm.h
+++ b/reactos/ntoskrnl/include/internal/amd64/mm.h
@@ -154,13 +154,6 @@
 
 #define ValidKernelPpe ValidKernelPde
 
-PULONG64
-FORCEINLINE
-MmGetPageDirectory(VOID)
-{
-    return (PULONG64)__readcr3();
-}
-
 PMMPTE
 FORCEINLINE
 MiAddressToPxe(PVOID Address)
diff --git a/reactos/ntoskrnl/include/internal/arm/mm.h b/reactos/ntoskrnl/include/internal/arm/mm.h
index 0bc642bd4e6..d75ba15493f 100644
--- a/reactos/ntoskrnl/include/internal/arm/mm.h
+++ b/reactos/ntoskrnl/include/internal/arm/mm.h
@@ -108,9 +108,6 @@ typedef enum _ARM_DOMAIN
     ManagerDomain
 } ARM_DOMAIN;
 
-struct _EPROCESS;
-PULONG MmGetPageDirectory(VOID);
-
 #define MI_MAKE_LOCAL_PAGE(x)      ((x)->u.Hard.NonGlobal = 1)
 #define MI_MAKE_DIRTY_PAGE(x)
 #define MI_MAKE_ACCESSED_PAGE(x)
diff --git a/reactos/ntoskrnl/include/internal/i386/mm.h b/reactos/ntoskrnl/include/internal/i386/mm.h
index 27237a67a2b..499294770a1 100644
--- a/reactos/ntoskrnl/include/internal/i386/mm.h
+++ b/reactos/ntoskrnl/include/internal/i386/mm.h
@@ -4,9 +4,6 @@
 
 #pragma once
 
-struct _EPROCESS;
-PULONG MmGetPageDirectory(VOID);
-
 #ifdef _PAE_
 #define _MI_PAGING_LEVELS 3
 #else
diff --git a/reactos/ntoskrnl/mm/arm/page.c b/reactos/ntoskrnl/mm/arm/page.c
index f9b15d63540..a3e7c24053a 100644
--- a/reactos/ntoskrnl/mm/arm/page.c
+++ b/reactos/ntoskrnl/mm/arm/page.c
@@ -137,14 +137,6 @@ MmCreateProcessAddressSpace(IN ULONG MinWs,
     return FALSE;
 }
 
-PULONG
-NTAPI
-MmGetPageDirectory(VOID)
-{
-    /* Return the TTB */
-    return (PULONG)KeArmTranslationTableRegisterGet().AsUlong;
-}
-
 NTSTATUS
 NTAPI
 MmCreateVirtualMappingUnsafe(IN PEPROCESS Process,
diff --git a/reactos/ntoskrnl/mm/arm/stubs.c b/reactos/ntoskrnl/mm/arm/stubs.c
index cbcd5f95027..9ad14bdc2f1 100644
--- a/reactos/ntoskrnl/mm/arm/stubs.c
+++ b/reactos/ntoskrnl/mm/arm/stubs.c
@@ -315,16 +315,6 @@ MmCreateProcessAddressSpace(IN ULONG MinWs,
     return TRUE;
 }
 
-PULONG
-NTAPI
-MmGetPageDirectory(VOID)
-{
-    //
-    // Return the TTB
-    //
-    return (PULONG)KeArmTranslationTableRegisterGet().AsUlong;
-}
-
 NTSTATUS
 NTAPI
 MmCreateVirtualMappingInternal(IN PEPROCESS Process,
diff --git a/reactos/ntoskrnl/mm/i386/pagepae.c b/reactos/ntoskrnl/mm/i386/pagepae.c
index 60457cc28fe..b6c255dabd4 100644
--- a/reactos/ntoskrnl/mm/i386/pagepae.c
+++ b/reactos/ntoskrnl/mm/i386/pagepae.c
@@ -105,14 +105,6 @@ MiFlushTlb(PULONG Pt, PVOID Address)
 #endif
 }
 
-
-
-PULONG
-MmGetPageDirectory(VOID)
-{
-   return (PULONG)__readcr3();
-}
-
 static ULONG
 ProtectToPTE(ULONG flProtect)
 {
diff --git a/reactos/ntoskrnl/mm/powerpc/page.c b/reactos/ntoskrnl/mm/powerpc/page.c
index 2a7ce4ad208..2d3db202e26 100644
--- a/reactos/ntoskrnl/mm/powerpc/page.c
+++ b/reactos/ntoskrnl/mm/powerpc/page.c
@@ -74,15 +74,6 @@ MiFlushTlb(PULONG Pt, PVOID Address)
     __asm__("tlbi %0" : "=r" (Address));
 }
 
-
-
-PULONG
-MmGetPageDirectory(VOID)
-{
-   unsigned int page_dir=0;
-   return((PULONG)page_dir);
-}
-
 static ULONG
 ProtectToFlags(ULONG flProtect)
 {