diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
index 22efd2d42a..1239aceb46 100644
--- a/src/qemu/qemu_agent.c
+++ b/src/qemu/qemu_agent.c
@@ -2166,6 +2166,7 @@ qemuAgentGetInterfaces(qemuAgentPtr agent,
 
         /* Has to be freed for each interface. */
         g_strfreev(ifname);
+        ifname = NULL;
 
         /* as well as IP address which - moreover -
          * can be presented multiple times */