diff --git a/src/main.ts b/src/main.ts
index 41012bf..099502d 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -72,7 +72,7 @@ export default class AutomaticLinkerPlugin extends Plugin {
 				body: fileContent.slice(contentStart),
 				linkResolverContext: {
 					filePath: activeFile.path.replace(/\.md$/, ""),
-					trie: this.trie ?? buildCandidateTrie([]).trie,
+					trie: this.trie ?? buildCandidateTrie([], undefined).trie,
 					candidateMap: this.candidateMap ?? new Map(),
 				},
 				settings: {
diff --git a/src/replace-links/index.ts b/src/replace-links/index.ts
index 0740738..06ffc6c 100644
--- a/src/replace-links/index.ts
+++ b/src/replace-links/index.ts
@@ -1,2 +1,2 @@
-export { getEffectiveNamespace, replaceLinks } from "./replace-links";
+export { replaceLinks } from "./replace-links";
 export type { ReplaceLinksOptions } from "./types";
diff --git a/src/trie.ts b/src/trie.ts
index ba70753..59049e9 100644
--- a/src/trie.ts
+++ b/src/trie.ts
@@ -25,7 +25,10 @@ export interface TrieNode {
  * If the path starts with one of the baseDir (e.g. "pages/"), the directory immediately
  * under the baseDir is considered the effective namespace.
  */
-export const getEffectiveNamespace = (path: string, baseDir?: string): string => {
+export const getEffectiveNamespace = (
+	path: string,
+	baseDir?: string,
+): string => {
 	const prefix = baseDir + "/";
 	if (baseDir) {
 		if (path.startsWith(prefix)) {
@@ -67,7 +70,7 @@ export interface CandidateData {
 
 export const buildCandidateTrie = (
 	allFiles: PathAndAliases[],
-	baseDir?: string,
+	baseDir: string | undefined,
 ) => {
 	// Process candidate strings from file paths.
 	type Candidate = {