diff --git a/trunk/user/shared/defaults.c b/trunk/user/shared/defaults.c
index 7a58f9bd894..65250c6be50 100644
--- a/trunk/user/shared/defaults.c
+++ b/trunk/user/shared/defaults.c
@@ -249,7 +249,7 @@ struct nvram_pair router_defaults[] = {
 	{ "wl_guest_mcs_mode", "0" },
 
 #if defined (USE_WID_5G) && USE_WID_5G==7615
-	{ "wl_mumimo", "1" },
+	{ "wl_mumimo", "0" },
 #endif
 
 	// ApCli 5Ghz
diff --git a/trunk/user/www/n56u_ribbon_fixed/Advanced_WAdvanced_Content.asp b/trunk/user/www/n56u_ribbon_fixed/Advanced_WAdvanced_Content.asp
index f6f74d43be4..a784882ffa1 100644
--- a/trunk/user/www/n56u_ribbon_fixed/Advanced_WAdvanced_Content.asp
+++ b/trunk/user/www/n56u_ribbon_fixed/Advanced_WAdvanced_Content.asp
@@ -377,8 +377,8 @@ function done_validating(action){
                                             <th><#WLANConfig11n_mumimo#></th>
                                             <td>
                                                 <select name="wl_mumimo" class="input">
-                                                    <option value="0" <% nvram_match_x("","wl_mumimo", "0","selected"); %>><#btn_Disable#></option>
-                                                    <option value="1" <% nvram_match_x("","wl_mumimo", "1","selected"); %>><#btn_Enable#> (*)</option>
+                                                    <option value="0" <% nvram_match_x("","wl_mumimo", "0","selected"); %>><#btn_Disable#> (*)</option>
+                                                    <option value="1" <% nvram_match_x("","wl_mumimo", "1","selected"); %>><#btn_Enable#></option>
                                                 </select>
                                             </td>
                                         </tr>