diff --git a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c
index 2ee293d64d..53cb6f0b48 100644
--- a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c
+++ b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdCtrller.c
@@ -1451,6 +1451,7 @@ KeyGetchar (
       //
       PushEfikeyBufTail (&ConsoleIn->EfiKeyQueueForNotify, &KeyData);
       gBS->SignalEvent (ConsoleIn->KeyNotifyProcessEvent);
+      break;
     }
   }
 
diff --git a/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.c b/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.c
index b3b5fb9ff4..9cb4b5db6b 100644
--- a/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.c
+++ b/MdeModulePkg/Bus/Usb/UsbKbDxe/KeyBoard.c
@@ -1695,6 +1695,7 @@ UsbKeyCodeToEfiInputKey (
       //
       Enqueue (&UsbKeyboardDevice->EfiKeyQueueForNotify, KeyData, sizeof (*KeyData));
       gBS->SignalEvent (UsbKeyboardDevice->KeyNotifyProcessEvent);
+      break;
     }
   }
 
diff --git a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c
index 33f9b6e585..d681a3039e 100644
--- a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c
+++ b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c
@@ -987,6 +987,7 @@ EfiKeyFiFoInsertOneKey (
       //
       EfiKeyFiFoForNotifyInsertOneKey (TerminalDevice->EfiKeyFiFoForNotify, Key);
       gBS->SignalEvent (TerminalDevice->KeyNotifyProcessEvent);
+      break;
     }
   }
   if (IsEfiKeyFiFoFull (TerminalDevice)) {