diff --git a/Gulpfile.ts b/Gulpfile.ts
index 2909b10471a..0c410bdfb08 100644
--- a/Gulpfile.ts
+++ b/Gulpfile.ts
@@ -528,7 +528,7 @@ gulp.task(tsserverLibraryFile, /*help*/ false, [servicesFile, typesMapJson], (do
     const serverLibraryProject = tsc.createProject("src/server/tsconfig.library.json", getCompilerSettings({ removeComments: false }, /*useBuiltCompiler*/ true));
     const {js, dts}: { js: NodeJS.ReadableStream, dts: NodeJS.ReadableStream } = serverLibraryProject.src()
         .pipe(sourcemaps.init())
-        .pipe(newer(tsserverLibraryFile))
+        .pipe(newer(<any>{ dest: tsserverLibraryFile, extra: ["src/compiler/**/*.ts", "src/services/**/*.ts"] }))
         .pipe(serverLibraryProject());
 
     return merge2([
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index e57b52942f4..a0dfa5f5d17 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -877,7 +877,7 @@ declare namespace ts {
     type DestructuringAssignment = ObjectDestructuringAssignment | ArrayDestructuringAssignment;
     type BindingOrAssignmentElement = VariableDeclaration | ParameterDeclaration | BindingElement | PropertyAssignment | ShorthandPropertyAssignment | SpreadAssignment | OmittedExpression | SpreadElement | ArrayLiteralExpression | ObjectLiteralExpression | AssignmentExpression<EqualsToken> | Identifier | PropertyAccessExpression | ElementAccessExpression;
     type BindingOrAssignmentElementRestIndicator = DotDotDotToken | SpreadElement | SpreadAssignment;
-    type BindingOrAssignmentElementTarget = BindingOrAssignmentPattern | Expression;
+    type BindingOrAssignmentElementTarget = BindingOrAssignmentPattern | Identifier | PropertyAccessExpression | ElementAccessExpression | OmittedExpression;
     type ObjectBindingOrAssignmentPattern = ObjectBindingPattern | ObjectLiteralExpression;
     type ArrayBindingOrAssignmentPattern = ArrayBindingPattern | ArrayLiteralExpression;
     type AssignmentPattern = ObjectLiteralExpression | ArrayLiteralExpression;