diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 6e251b3073ae283138ce811cacfe30ea129fd355..162579bfd44b0bd0d588347765fae6e069902acf 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -1889,15 +1889,21 @@ int qemuMonitorJSONBlockStatsUpdateCapacity(qemuMonitorPtr mon,
         if (STRPREFIX(dev_name, QEMU_DRIVE_HOST_PREFIX))
             dev_name += strlen(QEMU_DRIVE_HOST_PREFIX);
 
-        /* ignore missing info */
-        if (!(bstats = virHashLookup(stats, dev_name)))
-            continue;
-
         /* drive may be empty */
         if (!(inserted = virJSONValueObjectGet(dev, "inserted")) ||
             !(image = virJSONValueObjectGet(inserted, "image")))
             continue;
 
+        if (!(bstats = virHashLookup(stats, dev_name))) {
+            if (VIR_ALLOC(bstats) < 0)
+                goto cleanup;
+
+            if (virHashAddEntry(stats, dev_name, bstats) < 0) {
+                VIR_FREE(bstats);
+                goto cleanup;
+            }
+        }
+
         if (virJSONValueObjectGetNumberUlong(image, "virtual-size",
                                              &bstats->capacity) < 0)
             continue;