diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index 352c390d0c6fce203c86b0d9cce362b22f15c5b2..99cff65aae4d47cd7ad7d637f1c35f5ae5adddfe 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -950,6 +950,7 @@ static int cpudef_setfield(const char *name, const char *str, void *opaque)
     int err = 0;
 
     if (!strcmp(name, "name")) {
+        g_free((void *)def->name);
         def->name = g_strdup(str);
     } else if (!strcmp(name, "model_id")) {
         strncpy(def->model_id, str, sizeof (def->model_id));