diff --git a/target/hppa/helper.h b/target/hppa/helper.h
index bfe0dd1..38d834e 100644
--- a/target/hppa/helper.h
+++ b/target/hppa/helper.h
@@ -92,4 +92,5 @@
 DEF_HELPER_FLAGS_2(ptlb, TCG_CALL_NO_RWG, void, env, tl)
 DEF_HELPER_FLAGS_1(ptlbe, TCG_CALL_NO_RWG, void, env)
 DEF_HELPER_FLAGS_2(lpa, TCG_CALL_NO_WG, tr, env, tl)
+DEF_HELPER_FLAGS_1(change_prot_id, TCG_CALL_NO_RWG, void, env)
 #endif