diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 18e926cc60..86ed9edb35 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -1065,7 +1065,7 @@ qemuSetUnprivSGIO(virDomainDeviceDefPtr dev)
         disk = dev->data.disk;
 
         if (disk->device != VIR_DOMAIN_DISK_DEVICE_LUN ||
-            virDomainDiskSourceIsBlockType(disk))
+            !virDomainDiskSourceIsBlockType(disk))
             return 0;
 
         path = disk->src;