diff --git a/core/modules/widgets/block-mark.js b/core/modules/widgets/blockmark.js
similarity index 98%
rename from core/modules/widgets/block-mark.js
rename to core/modules/widgets/blockmark.js
index 027c6b450..962e944f8 100644
--- a/core/modules/widgets/block-mark.js
+++ b/core/modules/widgets/blockmark.js
@@ -73,4 +73,4 @@ BlockMarkWidget.prototype.refresh = function(changedTiddlers) {
}
};
-exports["block-mark"] = BlockMarkWidget;
+exports.blockmark = BlockMarkWidget;
diff --git a/editions/tw5.com/tiddlers/widgets/AnchorWidget.tid b/editions/tw5.com/tiddlers/widgets/BlockMarkWidget.tid
similarity index 85%
rename from editions/tw5.com/tiddlers/widgets/AnchorWidget.tid
rename to editions/tw5.com/tiddlers/widgets/BlockMarkWidget.tid
index 2d6d50f15..00f584cae 100644
--- a/editions/tw5.com/tiddlers/widgets/AnchorWidget.tid
+++ b/editions/tw5.com/tiddlers/widgets/BlockMarkWidget.tid
@@ -11,7 +11,7 @@ The block id widget make an block mark that can be focused and jump to.
! Content and Attributes
-The content of the `<$block-mark>` widget is ignored.
+The content of the `<$blockmark>` widget is ignored.
|!Attribute |!Description |
|id |The unique id for the block |
@@ -21,14 +21,14 @@ See [[Block Level Links in WikiText^🤗→AddingIDforblock]] for WikiText synta
! Example
-<