diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/EfiJump.h b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/EfiJump.h
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/EfiJump.h
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/EfiJump.h
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/IdtDumb.c b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/IdtDumb.c
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/IdtDumb.c
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/IdtDumb.c
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/Math.c b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/Math.c
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/Math.c
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/Math.c
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PeCoffLoaderEx.c b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PeCoffLoaderEx.c
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PeCoffLoaderEx.c
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PeCoffLoaderEx.c
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PeCoffLoaderEx.h b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PeCoffLoaderEx.h
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PeCoffLoaderEx.h
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PeCoffLoaderEx.h
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PeiServicePointer.c b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PeiServicePointer.c
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PeiServicePointer.c
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PeiServicePointer.c
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PerformancePrimitives.c b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PerformancePrimitives.c
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/PerformancePrimitives.c
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/PerformancePrimitives.c
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/Processor.c b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/Processor.c
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/Processor.c
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/Processor.c
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/ProcessorAsms.Asm b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/ProcessorAsms.Asm
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/ProcessorAsms.Asm
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/ProcessorAsms.Asm
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/ProcessorAsms.S b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/ProcessorAsms.S
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/ProcessorAsms.S
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/ProcessorAsms.S
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/SupportItpDebug.S b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/SupportItpDebug.S
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/SupportItpDebug.S
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/SupportItpDebug.S
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/SupportItpDebug.asm b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/SupportItpDebug.asm
similarity index 100%
rename from EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/x64/SupportItpDebug.asm
rename to EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/X64/SupportItpDebug.asm