diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
index cde898b..8b9b554 100644
--- a/hw/xen/xen_pt_config_init.c
+++ b/hw/xen/xen_pt_config_init.c
@@ -1924,7 +1924,7 @@
     if (reg->init) {
         uint32_t host_mask, size_mask;
         unsigned int offset;
-        uint32_t val;
+        uint32_t val = 0;
 
         /* initialize emulate register */
         rc = reg->init(s, reg_entry->reg,