diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 4360306989..023ec8a8b3 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -1264,6 +1264,10 @@ static const vshCmdOptDef opts_blkdeviotune[] = {
      .help = N_("I/O size in bytes")
     },
     {.name = "group_name",
+     .type = VSH_OT_ALIAS,
+     .help = "group-name"
+    },
+    {.name = "group-name",
      .type = VSH_OT_STRING,
      .help = N_("group name to share I/O quota between multiple drives")
     },
@@ -1398,8 +1402,8 @@ cmdBlkdeviotune(vshControl *ctl, const vshCmd *cmd)
     VSH_ADD_IOTUNE(write-iops-sec-max-length, WRITE_IOPS_SEC_MAX_LENGTH);
 #undef VSH_ADD_IOTUNE
 
-    if (vshCommandOptStringReq(ctl, cmd, "group_name", &group_name) < 0) {
-        vshError(ctl, "%s", _("Unable to parse group parameter"));
+    if (vshCommandOptStringReq(ctl, cmd, "group-name", &group_name) < 0) {
+        vshError(ctl, "%s", _("Unable to parse group-name parameter"));
         goto cleanup;
     }
 
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 18f16b51bd..a47040984b 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1139,7 +1139,7 @@ command.
 [I<read-bytes-sec-max-length>] [I<write-bytes-sec-max-length>]]
 [[I<total-iops-sec-max-length>] |
 [I<read-iops-sec-max-length>] [I<write-iops-sec-max-length>]]
-[I<size-iops-sec>] [I<group_name>]
+[I<size-iops-sec>] [I<group-name>]
 
 Set or query the block disk io parameters for a block device of I<domain>.
 I<device> specifies a unique target name (<target dev='name'/>) or source
@@ -1179,7 +1179,7 @@ read I/O operations limit.
 I<--write-iops-sec-max-length> specifies duration in seconds to allow maximum
 write I/O operations limit.
 I<--size-iops-sec> specifies size I/O operations limit per second.
-I<--group_name> specifies group name to share I/O quota between multiple drives.
+I<--group-name> specifies group name to share I/O quota between multiple drives.
 For a qemu domain, if no name is provided, then the default is to have a single
 group for each I<device>.