diff --git a/src/server/session.ts b/src/server/session.ts
index 688bccb935c..66b8cd6e284 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -490,6 +490,7 @@ namespace ts.server {
         globalPlugins?: ReadonlyArray<string>;
         pluginProbeLocations?: ReadonlyArray<string>;
         allowLocalPluginLoads?: boolean;
+        typesMapLocation?: string;
     }
 
     export class Session implements EventSender {
@@ -550,6 +551,7 @@ namespace ts.server {
                 globalPlugins: opts.globalPlugins,
                 pluginProbeLocations: opts.pluginProbeLocations,
                 allowLocalPluginLoads: opts.allowLocalPluginLoads,
+                typesMapLocation: opts.typesMapLocation,
                 syntaxOnly: opts.syntaxOnly,
             };
             this.projectService = new ProjectService(settings);
diff --git a/src/tsserver/server.ts b/src/tsserver/server.ts
index 8084d42e1c5..8a5c5b50906 100644
--- a/src/tsserver/server.ts
+++ b/src/tsserver/server.ts
@@ -520,6 +520,7 @@ namespace ts.server {
                 globalPlugins,
                 pluginProbeLocations,
                 allowLocalPluginLoads,
+                typesMapLocation,
             });
 
             this.eventPort = eventPort;
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 21ee605120a..68926b43c81 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -8679,6 +8679,7 @@ declare namespace ts.server {
         globalPlugins?: ReadonlyArray<string>;
         pluginProbeLocations?: ReadonlyArray<string>;
         allowLocalPluginLoads?: boolean;
+        typesMapLocation?: string;
     }
     class Session implements EventSender {
         private readonly gcTimer;