diff --git a/AUTHORS b/AUTHORS
index 57e124d582..76fa3cd2d8 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -240,6 +240,7 @@ Patches have also been contributed by:
   Viktor Mihajlovski   <mihajlov@linux.vnet.ibm.com>
   Thang Pham           <thang.pham@us.ibm.com>
   Eiichi Tsukata       <eiichi.tsukata.xh@hitachi.com>
+  Wido den Hollander   <wido@widodh.nl>
 
   [....send patches to get your name here....]
 
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index af5ff5b929..4d518b23fc 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -1775,6 +1775,8 @@ qemuBuildRBDString(virConnectPtr conn,
                             disk->auth.username);
             goto error;
         }
+    } else {
+        virBufferAddLit(opt, ":auth_supported=none");
     }
 
     if (disk->nhosts > 0) {