2 files changed, 2 insertions, 1 deletions
diff --git a/byob.js b/byob.js
index 2ff40ab..4b581e1 100644
--- a/byob.js
+++ b/byob.js
@@ -194,7 +194,7 @@ CustomBlockDefinition.prototype.prototypeInstance = function () {
                 part.fragment.type = slot[0];
                 part.fragment.defaultValue = slot[1];
                 part.fragment.options = slot[2];
-                part.fragment.isReadonly = slot[3] || false;
+                part.fragment.isReadOnly = slot[3] || false;
             }
         }
     });
diff --git a/history.txt b/history.txt
index 2b58162..d2ffc1d 100755
--- a/history.txt
+++ b/history.txt
@@ -2069,3 +2069,4 @@ ______
 ------
 * Threads: Revert pull request #295 (xhr-headers), breaks existing installations
 * BYOB: Fixed #292 (pulldowns loose lines when exported as library)
+* BYOB: Fixed #291 (readonly custom menus become non-readonly when block is edited)