diff --git a/MIGRATION.md b/MIGRATION.md
index 2ed7b74..c6bf824 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -3,14 +3,14 @@
 ## From `0.2.0` to `0.3.0`
 
 Every reader skips code text when it spells a mark other than a link, and `losslessMarkdownToAdf`
-also skips every other node Atlassian's schema withholds the mark from, text included for `border`:
+also skips every other node Atlassian's schema withholds the mark from:
 
 | Input | `0.2.0` | `0.3.0` |
 | --- | --- | --- |
 | a `date`, `emoji`, `inlineCard`, `mention`, `status` or `mediaInline` inside a mark's spelling (`**!adf:mention[@A]{id=x}**`) | the node holds the mark | the node holds only marks its type takes; text beside it keeps the mark |
 | a link around only nodes that cannot take it, hard breaks aside, or a directive mark around only such nodes or code spans (`[!adf:status[Done]{color=green}](/u)`) | the nodes hold the mark | `unsupported-node-shape`; write the mark around text beside them |
 | a code span inside any mark's spelling but a link's (``**`npm ci`**``) | the code text holds the mark | the code text holds only `code`, and a link where one wraps it |
-| text inside `!adf:border[…]` (`!adf:border[x]{color="#091e42" size=2}`) | the text holds `border` | `unsupported-node-shape` where the mark wraps only text, else the text holds no `border`; `border` marks a `mediaInline` alone |
+| text inside `!adf:border[…]` (`!adf:border[x]{color="#091e42" size=2}`) | the text holds `border` | the text holds none, and where nothing the spelling wraps takes `border`, `unsupported-node-shape`: delete the spelling and keep its text. Only a `mediaInline` takes `border` |
 
 `0.3.0`'s `adfToLosslessMarkdown` writes a node holding a withheld mark as `!adf:carry{json="…"}`,
 where `0.2.0` wrote these spellings. `0.3.0` reads markdown stored from such a document without the
diff --git a/README.md b/README.md
index d2e5b78..06aa83e 100644
--- a/README.md
+++ b/README.md
@@ -412,7 +412,6 @@ Ping !adf:mention[@Mikael]{id=5b10a2} — !adf:status[In review]{color=yellow} 
 | --- | --- |
 | `blockquote`, `bulletList`, `codeBlock`, `heading`, `listItem`, `orderedList`, `paragraph`, `rule` carrying `localId`, marks or a value CommonMark cannot spell | the same node in directive form, `!adf:paragraph {localId=…}` |
 | `border` | an inline directive mark around a `mediaInline`, the one inline node that takes it |
-| `subsup`, `textColor`, `underline` | inline directive marks around their text, `!adf:textColor[**Overdue**]{color="#ae2e24"}` |
 | `caption`, `media`, `mediaGroup`, `mediaSingle` | the media family; an image CommonMark cannot spell, a stored file, a caption |
 | `date`, `emoji`, `inlineCard`, `mediaInline`, `mention`, `status` | inline leaves; `emoji`, `mention` and `status` spell their `text` in the `[content]` slot |
 | `decisionList`, `decisionItem` | containers |
@@ -421,6 +420,7 @@ Ping !adf:mention[@Mikael]{id=5b10a2} — !adf:status[In review]{color=yellow} 
 | `layoutSection`, `layoutColumn` | containers |
 | `link` with an attribute besides `href` and `title`, or a target CommonMark cannot spell | `!adf:link[text]{attrs}` |
 | `panel` | a container, the type its argument: `!adf:panel info` |
+| `subsup`, `textColor`, `underline` | inline directive marks around their text, `!adf:textColor[**Overdue**]{color="#ae2e24"}` |
 | `syncBlock`, `bodiedSyncBlock` | a leaf and a container |
 | `table`, `tableRow`, `tableCell`, `tableHeader` richer than a pipe table | containers nesting block content |
 | `taskList`, `taskItem`, `blockTaskItem` | containers, the state an argument: `!adf:taskItem DONE` |
@@ -625,7 +625,7 @@ Every call can raise these:
   - puts a line ending or a null character in an `emoji`, `mention` or `status` content slot:
     replace a line ending with a space, or, for either, write the node as `!adf:carry`;
   - wraps a directive mark around nothing, or only around nodes that take no such mark, such as a
-    hard break, a mention or a code span;
+    hard break, a mention, a code span or, for `border`, text;
   - writes a link whose text holds something besides hard breaks, but no node that takes a link,
     such as `[!adf:status[Done]{color=green}](/u)`: write the link around text beside them;
   - writes as a directive a node or mark the lossless flavour spells as CommonMark;
diff --git a/src/markdown/inline-content.ts b/src/markdown/inline-content.ts
index 766ef80..9af406d 100644
--- a/src/markdown/inline-content.ts
+++ b/src/markdown/inline-content.ts
@@ -259,7 +259,8 @@ function directiveMarkPieces(scan: Scan, name: string, mark: AdfMark, slot: read
   }
   if (nodes.some(holdsOwnMarks)) return failure('unsupported-node-shape', ownMarksInMark, scan.shared.path)
   if (!nodes.some((node) => marksItem(node, mark.type))) {
-    return failure('unsupported-node-shape', `the ${name} mark wraps the [content] it marks: this one wraps only nodes that take no ${name} mark: write the ${name} mark around text beside them`, scan.shared.path)
+    const fix = mark.type === 'border' ? 'only a mediaInline takes border: delete the border spelling' : `write the ${name} mark around text beside them`
+    return failure('unsupported-node-shape', `the ${name} mark wraps the [content] it marks: this one wraps only nodes that take no ${name} mark: ${fix}`, scan.shared.path)
   }
   const refused = mark.type === 'link' ? refuseLinkDirective(scan, mark, nodes, index) : undefined
   if (refused !== undefined) return refused
diff --git a/src/markdown/parse/markdown-to-adf.test.ts b/src/markdown/parse/markdown-to-adf.test.ts
index b38c02a..8fedf61 100644
--- a/src/markdown/parse/markdown-to-adf.test.ts
+++ b/src/markdown/parse/markdown-to-adf.test.ts
@@ -927,7 +927,7 @@ test('gives an inline node no mark Atlassian\'s schema withholds from it', () =>
   assert.deepEqual(read('!adf:border[!adf:mediaInline{id=m1}]{color="#091e42" size=2}\n'), [{ content: [{ ...media, marks: [border] }], type: 'paragraph' }])
   assert.deepEqual(read('[!adf:mediaInline{id=m1}](/u)\n'), [{ content: [{ ...media, marks: [link('/u')] }], type: 'paragraph' }])
   assert.deepEqual(read('!adf:border[a !adf:mediaInline{id=m1}]{color="#091e42" size=2}\n'), [{ content: [{ text: 'a ', type: 'text' }, { ...media, marks: [border] }], type: 'paragraph' }])
-  const unborderable = 'unsupported-node-shape: the border mark wraps the [content] it marks: this one wraps only nodes that take no border mark: write the border mark around text beside them'
+  const unborderable = 'unsupported-node-shape: the border mark wraps the [content] it marks: this one wraps only nodes that take no border mark: only a mediaInline takes border: delete the border spelling'
   assert.equal(read('!adf:border[a]{color="#091e42" size=2}\n'), unborderable)
   assert.equal(read('_!adf:border[a]{color="#091e42" size=2}_\n'), unborderable)
   assert.equal(read('!adf:underline[!adf:border[a]{color="#091e42" size=2}]\n'), unborderable)