diff --git a/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c b/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c
index dea54f35b8b5..4da99cb7218d 100644
--- a/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c
+++ b/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c
@@ -19,7 +19,7 @@ struct bios_args {
 	u32 command;
 	u32 commandtype;
 	u32 datasize;
-	u8 data[];
+	u8 data[] __counted_by(datasize);
 };
 
 /**