diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index 876afe46f316..57a2d6518d27 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -293,7 +293,10 @@ static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
 	unsigned long reg0 = qid | (5UL << 24) | ((ifbit & 0x01) << 22);
 	union {
 		unsigned long value;
-		struct ap_queue_status status;
+		struct {
+			u32 _pad;
+			struct ap_queue_status status;
+		};
 	} reg1;
 	unsigned long reg2;