diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index d64661f..7acafb8 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -104,7 +104,7 @@
 #define GUID_LEN 36
 
 static bool efivars_pstore_disable =
-	IS_ENABLED(EFI_VARS_PSTORE_DEFAULT_DISABLE);
+	IS_ENABLED(CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE);
 
 module_param_named(pstore_disable, efivars_pstore_disable, bool, 0644);