diff --git a/resources/definitions/ankermake_m5c.def.json b/resources/definitions/ankermake_m5c.def.json
index 190b8ff8ec..4e55d39406 100644
--- a/resources/definitions/ankermake_m5c.def.json
+++ b/resources/definitions/ankermake_m5c.def.json
@@ -151,8 +151,7 @@
       "value": 250
     },
     "speed_wall_x_roofing": {
-      "maximum_value_warning": "550",
-      "value": "speed_wall_x"
+      "maximum_value_warning": "550"
     },
     "speed_support_interface": {
       "maximum_value_warning": "550",
@@ -266,4 +265,4 @@
     "support_xy_overrides_z": { "value": "xy_overrides_z" },
     "support_offset": { "value": 2 }
   }
-}
\ No newline at end of file
+}