diff --git a/src/runtime/proc.go b/src/runtime/proc.go
index 16794e1ab0..30ddeadff5 100644
--- a/src/runtime/proc.go
+++ b/src/runtime/proc.go
@@ -4124,7 +4124,7 @@ func releasep() *p {
 	}
 	_p_ := _g_.m.p.ptr()
 	if _p_.m.ptr() != _g_.m || _p_.mcache != _g_.m.mcache || _p_.status != _Prunning {
-		print("releasep: m=", _g_.m, " m->p=", _g_.m.p.ptr(), " p->m=", _p_.m, " m->mcache=", _g_.m.mcache, " p->mcache=", _p_.mcache, " p->status=", _p_.status, "\n")
+		print("releasep: m=", _g_.m, " m->p=", _g_.m.p.ptr(), " p->m=", hex(_p_.m), " m->mcache=", _g_.m.mcache, " p->mcache=", _p_.mcache, " p->status=", _p_.status, "\n")
 		throw("releasep: invalid p state")
 	}
 	if trace.enabled {