diff --git a/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.c b/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.c
index 86046081fe..6f153d0c3f 100644
--- a/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.c
+++ b/IntelFrameworkModulePkg/Universal/BdsDxe/DeviceMngr/DeviceManager.c
@@ -359,12 +359,18 @@ CallDeviceManager (
     }
 
     String = HiiGetString (HiiHandles[Index], FormSetTitle, NULL);
-    ASSERT (String != NULL);
+    if (String == NULL) {
+      String = HiiGetString (HiiHandle, STR_MISSING_STRING, NULL);
+      ASSERT (String != NULL);
+    }
     Token = HiiSetString (HiiHandle, 0, String, NULL);
     FreePool (String);
 
     String = HiiGetString (HiiHandles[Index], FormSetHelp, NULL);
-    ASSERT (String != NULL);
+    if (String == NULL) {
+      String = HiiGetString (HiiHandle, STR_MISSING_STRING, NULL);
+      ASSERT (String != NULL);
+    }
     TokenHelp = HiiSetString (HiiHandle, 0, String, NULL);
     FreePool (String);
 
diff --git a/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c b/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c
index 0a067f0376..15d4af3cf1 100644
--- a/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c
+++ b/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c
@@ -76,6 +76,8 @@ CHAR16            *gAdjustNumber;
 CHAR16            *gSaveChanges;
 CHAR16            *gOptionMismatch;
 
+CHAR16            *mUnknownString = L"!";
+
 CHAR16            gPromptBlockWidth;
 CHAR16            gOptionBlockWidth;
 CHAR16            gHelpBlockWidth;
@@ -650,7 +652,10 @@ GetToken (
   EFI_STRING  String;
 
   String = HiiGetString (HiiHandle, Token, NULL);
-  ASSERT (String != NULL);
+  if (String == NULL) {
+    String = AllocateCopyPool (sizeof (mUnknownString), mUnknownString);
+    ASSERT (String != NULL);
+  }
   return (CHAR16 *) String;
 }