diff --git a/MdePkg/Library/DxeRngLib/DxeRngLib.inf b/MdePkg/Library/DxeRngLib/DxeRngLib.inf
index 68554ad211..9c11959f8a 100644
--- a/MdePkg/Library/DxeRngLib/DxeRngLib.inf
+++ b/MdePkg/Library/DxeRngLib/DxeRngLib.inf
@@ -14,7 +14,7 @@
   FILE_GUID       = FF9F84C5-A33E-44E3-9BB5-0D654B2D4149
   MODULE_TYPE     = DXE_DRIVER
   VERSION_STRING  = 1.0
-  LIBRARY_CLASS   = RngLib|DXE_DRIVER UEFI_APPLICATION UEFI_DRIVER
+  LIBRARY_CLASS   = RngLib|DXE_DRIVER DXE_RUNTIME_DRIVER UEFI_APPLICATION UEFI_DRIVER
 
 [Packages]
   MdePkg/MdePkg.dec