diff --git a/docs/content/docs/features/custom-schemas/custom-inline-content.mdx b/docs/content/docs/features/custom-schemas/custom-inline-content.mdx
index 5c97fcae72..d8165130b8 100644
--- a/docs/content/docs/features/custom-schemas/custom-inline-content.mdx
+++ b/docs/content/docs/features/custom-schemas/custom-inline-content.mdx
@@ -11,12 +11,13 @@ In addition to the default inline content types that BlockNote offers, you can a
 
 ## Creating a Custom Inline Content Type
 
-Use the `createReactInlineContentSpec` function to create a custom inline content type. This function takes two arguments:
+Use the `createReactInlineContentSpec` function to create a custom inline content type. This function takes three arguments:
 
 ```typescript
 function createReactInlineContentSpec(
   blockConfig: CustomInlineContentConfig,
   blockImplementation: ReactInlineContentImplementation,
+  extensions?: (Extension | ExtensionFactoryInstance)[],
 ): InlineContentSpec;
 ```
 
@@ -157,6 +158,12 @@ type ReactCustomInlineContentImplementation = {
   should also return an HTML inline element._
 </Callout>
 
+### Inline Content Extensions
+
+While the example on this page doesn't use it, `createReactInlineContentSpec` takes a third, optional argument `extensions`. This is for adding editor `extensions` that are specific to the inline content, which you can find out more about [here](/docs/features/extensions).
+
+Inline content extensions are typically things like keyboard shortcuts, or input rules that turn typed text into the inline content.
+
 ## Adding Custom Inline Content to the Editor
 
 Finally, create a BlockNoteSchema using the definition of your custom inline content:
diff --git a/packages/core/src/editor/managers/ExtensionManager/ExtensionManager.node.test.ts b/packages/core/src/editor/managers/ExtensionManager/ExtensionManager.node.test.ts
index a225205177..36af5d9c82 100644
--- a/packages/core/src/editor/managers/ExtensionManager/ExtensionManager.node.test.ts
+++ b/packages/core/src/editor/managers/ExtensionManager/ExtensionManager.node.test.ts
@@ -254,6 +254,7 @@ it("registers extensions and plugins from editor options, nested extensions, and
   const inlineSpec = createInlineContentSpec(
     { type: "customInline", propSchema: {}, content: "styled" },
     { render },
+    [inline.extension()],
   );
   const styleSpec = createStyleSpec(
     { type: "customStyle", propSchema: "boolean" },
@@ -275,7 +276,6 @@ it("registers extensions and plugins from editor options, nested extensions, and
     inlineContentSpecs: {
       customInline: {
         ...inlineSpec,
-        extensions: [inline.extension()],
         implementation: {
           ...inlineSpec.implementation,
           node: inlineSpec.implementation.node.extend({
diff --git a/packages/core/src/schema/inlineContent/createSpec.ts b/packages/core/src/schema/inlineContent/createSpec.ts
index ab16692f26..c4c020db43 100644
--- a/packages/core/src/schema/inlineContent/createSpec.ts
+++ b/packages/core/src/schema/inlineContent/createSpec.ts
@@ -10,6 +10,10 @@ import {
 import { inlineContentToNodes } from "../../api/nodeConversions/blockToNode.js";
 import { nodeToCustomInlineContent } from "../../api/nodeConversions/nodeToBlock.js";
 import type { BlockNoteEditor } from "../../editor/BlockNoteEditor.js";
+import type {
+  Extension,
+  ExtensionFactoryInstance,
+} from "../../editor/BlockNoteExtension.js";
 import { ignoreDarkReaderMutations } from "../nodeViewMutations.js";
 import { propsToAttributes } from "../blocks/internal.js";
 import { nonFormattingMarks } from "../markGroups.js";
@@ -259,6 +263,7 @@ export function createInlineContentSpec<
 >(
   inlineContentConfig: T,
   inlineContentImplementation: CustomInlineContentImplementation<T, S>,
+  extensions?: (Extension | ExtensionFactoryInstance)[],
 ): InlineContentSpec<T> {
   const node = Node.create({
     name: inlineContentConfig.type,
@@ -405,5 +410,6 @@ export function createInlineContentSpec<
         );
       },
     },
+    extensions,
   ) as InlineContentSpec<T>;
 }
diff --git a/packages/core/src/schema/inlineContent/internal.ts b/packages/core/src/schema/inlineContent/internal.ts
index cc603b2ee2..7b01492892 100644
--- a/packages/core/src/schema/inlineContent/internal.ts
+++ b/packages/core/src/schema/inlineContent/internal.ts
@@ -95,6 +95,7 @@ export function createInlineContentSpecFromTipTapNode<
     InlineContentImplementation<CustomInlineContentConfig>,
     "node"
   >,
+  extensions?: (Extension | ExtensionFactoryInstance)[],
 ) {
   return createInternalInlineContentSpec(
     {
@@ -119,6 +120,7 @@ export function createInlineContentSpecFromTipTapNode<
       propSchema: P;
       content: "styled" | "none" | "plain";
     }>,
+    extensions,
   );
 }