diff --git a/src/util/virmacaddr.h b/src/util/virmacaddr.h
index 3515264129f9e8c40d54d988696a9a0024110775..39dd51bd8152abc34fed823532eae68000a3925a 100644
--- a/src/util/virmacaddr.h
+++ b/src/util/virmacaddr.h
@@ -67,5 +67,6 @@ bool virMacAddrIsMulticast(const virMacAddr *addr);
 bool virMacAddrIsBroadcastRaw(const unsigned char s[VIR_MAC_BUFLEN]);
 void virMacAddrFree(virMacAddrPtr addr);
 
+VIR_DEFINE_AUTOPTR_FUNC(virMacAddr, virMacAddrFree)
 
 #endif /* __VIR_MACADDR_H__ */