diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 459b4b12d8314..dd27130ea72fe 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -403,7 +403,7 @@ namespace ts.server {
         /* @internal */
         pendingEnsureProjectForOpenFiles: boolean;
 
-        readonly currentDirectory: string;
+        readonly currentDirectory: NormalizedPath;
         readonly toCanonicalFileName: (f: string) => string;
 
         public readonly host: ServerHost;
@@ -450,7 +450,7 @@ namespace ts.server {
             if (this.host.realpath) {
                 this.realpathToScriptInfos = createMultiMap();
             }
-            this.currentDirectory = this.host.getCurrentDirectory();
+            this.currentDirectory = toNormalizedPath(this.host.getCurrentDirectory());
             this.toCanonicalFileName = createGetCanonicalFileName(this.host.useCaseSensitiveFileNames);
             this.globalCacheLocationDirectoryPath = this.typingsInstaller.globalTypingsCacheLocation &&
                 ensureTrailingDirectorySeparator(this.toPath(this.typingsInstaller.globalTypingsCacheLocation));
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 6c3e0c9b7a193..5ea9484aaf859 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -8154,7 +8154,7 @@ declare namespace ts.server {
         private safelist;
         private legacySafelist;
         private pendingProjectUpdates;
-        readonly currentDirectory: string;
+        readonly currentDirectory: NormalizedPath;
         readonly toCanonicalFileName: (f: string) => string;
         readonly host: ServerHost;
         readonly logger: Logger;