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-rw-r--r--target-s390x/helper.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/target-s390x/helper.h b/target-s390x/helper.h
index 7e048ecb00..6be9f44aec 100644
--- a/target-s390x/helper.h
+++ b/target-s390x/helper.h
@@ -87,7 +87,7 @@ DEF_HELPER_FLAGS_1(popcnt, TCG_CALL_NO_RWG_SE, i64, i64)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_3(servc, i32, env, i64, i64)
-DEF_HELPER_4(diag, i64, env, i32, i64, i64)
+DEF_HELPER_4(diag, void, env, i32, i32, i32)
DEF_HELPER_3(load_psw, noreturn, env, i64, i64)
DEF_HELPER_FLAGS_2(spx, TCG_CALL_NO_RWG, void, env, i64)
DEF_HELPER_FLAGS_1(stck, TCG_CALL_NO_RWG_SE, i64, env)