diff --git a/ShellPkg/Application/Shell/Shell.c b/ShellPkg/Application/Shell/Shell.c
index 656206fdce..2adc99240c 100644
--- a/ShellPkg/Application/Shell/Shell.c
+++ b/ShellPkg/Application/Shell/Shell.c
@@ -726,6 +726,7 @@ FreeResources:
 **/
 EFI_STATUS
 SetBuiltInAlias(
+  VOID
   )
 {
   EFI_STATUS          Status;
diff --git a/ShellPkg/Application/Shell/ShellProtocol.c b/ShellPkg/Application/Shell/ShellProtocol.c
index 5e34b8dad1..dc3deee071 100644
--- a/ShellPkg/Application/Shell/ShellProtocol.c
+++ b/ShellPkg/Application/Shell/ShellProtocol.c
@@ -1679,6 +1679,7 @@ InternalShellExecute(
 STATIC
 BOOLEAN
 NestingEnabled(
+  VOID
 )
 {
   EFI_STATUS  Status;
@@ -3286,6 +3287,7 @@ EfiShellIsRootShell(
 **/
 CHAR16 *
 InternalEfiShellGetListAlias(
+  VOID
   )
 {
   
diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
index 25d3e33533..677791c67f 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
@@ -369,6 +369,7 @@ ShellLibDestructor (
 EFI_STATUS
 EFIAPI
 ShellInitialize (
+  VOID
   )
 {
   EFI_STATUS Status;