diff --git a/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c b/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c
index 4a8a97b94f..3e867fc514 100644
--- a/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c
+++ b/ShellPkg/Library/UefiShellDebug1CommandsLib/Pci.c
@@ -2370,6 +2370,7 @@ PCI_CONFIG_SPACE  *mConfigSpace = NULL;
 STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
   {L"-s", TypeValue},
   {L"-i", TypeFlag},
+  {L"-_e", TypeFlag},
   {NULL, TypeMax}
   };