diff --git a/src/server/protocol.ts b/src/server/protocol.ts
index f9f3b1910cd40..6a52afc81757c 100644
--- a/src/server/protocol.ts
+++ b/src/server/protocol.ts
@@ -617,6 +617,12 @@ namespace ts.server.protocol {
          * so this description should make sense by itself if the parent is inlineable=true
          */
         description: string;
+
+        /**
+         * A message to show to the user if the refactoring cannot be applied in
+         * the current context.
+         */
+        notApplicableReason?: string;
     }
 
     export interface GetEditsForRefactorRequest extends Request {
@@ -3223,6 +3229,7 @@ namespace ts.server.protocol {
         readonly allowTextChangesInNewFiles?: boolean;
         readonly lazyConfiguredProjectsFromExternalProject?: boolean;
         readonly providePrefixAndSuffixTextForRename?: boolean;
+        readonly provideRefactorNotApplicableReason?: boolean;
         readonly allowRenameOfImportPath?: boolean;
         readonly includePackageJsonAutoImports?: "auto" | "on" | "off";
     }
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index 621b4141291f3..2b5ca8d1f18f6 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -6956,6 +6956,11 @@ declare namespace ts.server.protocol {
          * so this description should make sense by itself if the parent is inlineable=true
          */
         description: string;
+        /**
+         * A message to show to the user if the refactoring cannot be applied in
+         * the current context.
+         */
+        notApplicableReason?: string;
     }
     interface GetEditsForRefactorRequest extends Request {
         command: CommandTypes.GetEditsForRefactor;
@@ -8983,6 +8988,7 @@ declare namespace ts.server.protocol {
         readonly allowTextChangesInNewFiles?: boolean;
         readonly lazyConfiguredProjectsFromExternalProject?: boolean;
         readonly providePrefixAndSuffixTextForRename?: boolean;
+        readonly provideRefactorNotApplicableReason?: boolean;
         readonly allowRenameOfImportPath?: boolean;
         readonly includePackageJsonAutoImports?: "auto" | "on" | "off";
     }