diff --git a/kvm-all.c b/kvm-all.c
index c86626f9ff46456be12adabb9f4ac2a381de71c3..4bfecccf8e99698c3b0bae25404832dd769278a7 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -417,7 +417,7 @@ static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section)
 {
     KVMState *s = kvm_state;
     unsigned long size, allocated_size = 0;
-    KVMDirtyLog d;
+    KVMDirtyLog d = {};
     KVMSlot *mem;
     int ret = 0;
     hwaddr start_addr = section->offset_within_address_space;