diff --git a/src/vs/editor/common/modes.ts b/src/vs/editor/common/modes.ts
index 7908774ac43b8a14ec88c4668edb8b96a665044e..55581b24c795c80be02743bae699aff9ef4e984d 100644
--- a/src/vs/editor/common/modes.ts
+++ b/src/vs/editor/common/modes.ts
@@ -739,6 +739,9 @@ export interface LocationLink {
 	targetSelectionRange?: IRange;
 }
 
+/**
+ * @internal
+ */
 export function isLocationLink(thing: any): thing is LocationLink {
 	return thing
 		&& URI.isUri((thing as LocationLink).uri)
diff --git a/src/vs/monaco.d.ts b/src/vs/monaco.d.ts
index 6dd1279bb4a209d3769ea712cce3bc14beca6066..4ec47e159d8cfed960aa0effc0c0e6198e565a3b 100644
--- a/src/vs/monaco.d.ts
+++ b/src/vs/monaco.d.ts
@@ -5038,8 +5038,6 @@ declare namespace monaco.languages {
 		targetSelectionRange?: IRange;
 	}
 
-	export function isLocationLink(thing: any): thing is LocationLink;
-
 	export type Definition = Location | Location[] | LocationLink[];
 
 	/**