diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index e13a6f9..cc8371a 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -62,6 +62,22 @@
 	  Select this option if you want non-volatile UEFI variables to be
 	  stored as file /ubootefi.var on the EFI system partition.
 
+config EFI_RT_VOLATILE_STORE
+	bool "Allow variable runtime services in volatile storage (e.g RAM)"
+	depends on EFI_VARIABLE_FILE_STORE
+	help
+	  When EFI variables are stored on file we don't allow SetVariableRT,
+	  since the OS doesn't know how to write that file. At he same time
+	  we copy runtime variables in DRAM and support GetVariableRT
+
+	  Enable this option to allow SetVariableRT on the RAM backend of
+	  the EFI variable storage. The OS will be responsible for syncing
+	  the RAM contents to the file, otherwise any changes made during
+	  runtime won't persist reboots.
+	  Authenticated variables are not supported. Note that this will
+	  violate the EFI spec since writing auth variables will return
+	  EFI_INVALID_PARAMETER
+
 config EFI_MM_COMM_TEE
 	bool "UEFI variables storage service via the trusted world"
 	depends on OPTEE