diff --git a/reactos/boot/environ/CMakeLists.txt b/reactos/boot/environ/CMakeLists.txt
index 557bfff0c3c..3b043180fab 100644
--- a/reactos/boot/environ/CMakeLists.txt
+++ b/reactos/boot/environ/CMakeLists.txt
@@ -46,9 +46,13 @@ elseif(ARCH STREQUAL "amd64")
          )
     list(APPEND BOOTLIB_SOURCE
          #lib/arch/amd64/foo.c
+         lib/arch/stub/arch.c
+         lib/mm/stub/mm.c
          )
 else()
-#TBD
+    list(APPEND BOOTLIB_SOURCE
+         lib/arch/stub/arch.c
+         )
 endif()
 
 add_asm_files(bootlib_asm ${BOOTLIB_ASM_SOURCE})
diff --git a/reactos/boot/environ/lib/arch/stub/arch.c b/reactos/boot/environ/lib/arch/stub/arch.c
new file mode 100644
index 00000000000..9de3f006f5a
--- /dev/null
+++ b/reactos/boot/environ/lib/arch/stub/arch.c
@@ -0,0 +1,46 @@
+/*
+ * COPYRIGHT:       See COPYING.ARM in the top level directory
+ * PROJECT:         ReactOS UEFI Boot Library
+ * FILE:            boot/environ/lib/arch/stub/arch.c
+ * PURPOSE:         Boot Library Architectural Initialization Skeleton Code
+ * PROGRAMMER:      Alex Ionescu (alex.ionescu@reactos.org)
+ */
+
+/* INCLUDES ******************************************************************/
+
+#include "bl.h"
+
+/* DATA VARIABLES ************************************************************/
+
+PBL_ARCH_CONTEXT CurrentExecutionContext;
+
+/* FUNCTIONS *****************************************************************/
+
+VOID
+BlpArchSwitchContext (
+    _In_ BL_ARCH_MODE NewMode
+    )
+{
+}
+
+/*++
+* @name BlpArchInitialize
+*
+*     The BlpArchInitialize function initializes the Boot Library.
+*
+* @param  Phase
+*         Pointer to the Boot Application Parameter Block.
+*
+* @return NT_SUCCESS if the boot library was loaded correctly, relevant error
+*         otherwise.
+*
+*--*/
+NTSTATUS
+BlpArchInitialize (
+    _In_ ULONG Phase
+    )
+{
+    EfiPrintf(L" BlpArchInitialize NOT IMPLEMENTED for this platform\r\n");
+    return STATUS_NOT_IMPLEMENTED;
+}
+
diff --git a/reactos/boot/environ/lib/mm/stub/mm.c b/reactos/boot/environ/lib/mm/stub/mm.c
new file mode 100644
index 00000000000..bb2b2471768
--- /dev/null
+++ b/reactos/boot/environ/lib/mm/stub/mm.c
@@ -0,0 +1,25 @@
+/*
+ * COPYRIGHT:       See COPYING.ARM in the top level directory
+ * PROJECT:         ReactOS UEFI Boot Library
+ * FILE:            boot/environ/lib/mm/stub/mm.c
+ * PURPOSE:         Boot Library Memory Manager Skeleton Code
+ * PROGRAMMER:      Alex Ionescu (alex.ionescu@reactos.org)
+ */
+
+/* INCLUDES ******************************************************************/
+
+#include "bl.h"
+
+/* FUNCTIONS *****************************************************************/
+
+NTSTATUS
+MmArchInitialize (
+    _In_ ULONG Phase,
+    _In_ PBL_MEMORY_DATA MemoryData,
+    _In_ BL_TRANSLATION_TYPE TranslationType,
+    _In_ BL_TRANSLATION_TYPE RequestedTranslationType
+    )
+{
+    EfiPrintf(L" MmArchInitialize NOT IMPLEMENTED for this platform\r\n");
+    return STATUS_NOT_IMPLEMENTED;
+}