diff --git a/src/traces/carpet/axis_defaults.js b/src/traces/carpet/axis_defaults.js
index f58bb3786e2..62e01c0776e 100644
--- a/src/traces/carpet/axis_defaults.js
+++ b/src/traces/carpet/axis_defaults.js
@@ -165,7 +165,7 @@ module.exports = function handleAxisDefaults(containerIn, containerOut, options)
 
     if(!showGrid) {
         delete containerOut.gridcolor;
-        delete containerOut.gridWidth;
+        delete containerOut.gridwidth;
     } else {
         coerce('minorgridcount');
         coerce('minorgridwidth', gridWidth);