diff --git a/Sources/SKCore/BuildServerBuildSystem.swift b/Sources/SKCore/BuildServerBuildSystem.swift
index 61a6b2d0..3c4bf412 100644
--- a/Sources/SKCore/BuildServerBuildSystem.swift
+++ b/Sources/SKCore/BuildServerBuildSystem.swift
@@ -149,7 +149,7 @@ extension BuildServerBuildSystem: BuildSystem {
 
   /// Register the given file for build-system level change notifications, such as command
   /// line flag changes, dependency changes, etc.
-  public func registerForChangeNotifications(for uri: DocumentURI) {
+  public func registerForChangeNotifications(for uri: DocumentURI, language: Language) {
     let request = RegisterForChanges(uri: uri, action: .register)
     _ = self.buildServer?.send(request, queue: requestQueue, reply: { result in
       if let error = result.failure {
diff --git a/Sources/SKCore/BuildSystem.swift b/Sources/SKCore/BuildSystem.swift
index 18476fd6..488522b0 100644
--- a/Sources/SKCore/BuildSystem.swift
+++ b/Sources/SKCore/BuildSystem.swift
@@ -40,7 +40,7 @@ public protocol BuildSystem: AnyObject {
 
   /// Register the given file for build-system level change notifications, such
   /// as command line flag changes, dependency changes, etc.
-  func registerForChangeNotifications(for: DocumentURI)
+  func registerForChangeNotifications(for: DocumentURI, language: Language)
 
   /// Unregister the given file for build-system level change notifications,
   /// such as command line flag changes, dependency changes, etc.
diff --git a/Sources/SKCore/BuildSystemList.swift b/Sources/SKCore/BuildSystemList.swift
index 18c0ee04..74b4d66c 100644
--- a/Sources/SKCore/BuildSystemList.swift
+++ b/Sources/SKCore/BuildSystemList.swift
@@ -47,9 +47,9 @@ extension BuildSystemList: BuildSystem {
 
   /// Register the given file for build-system level change notifications, such as command
   /// line flag changes, dependency changes, etc.
-  public func registerForChangeNotifications(for uri: DocumentURI) {
+  public func registerForChangeNotifications(for uri: DocumentURI, language: Language) {
     // Only register with the primary build system, since we only use its delegate.
-    providers.first?.registerForChangeNotifications(for: uri)
+    providers.first?.registerForChangeNotifications(for: uri, language: language)
   }
 
   /// Unregister the given file for build-system level change notifications, such as command
diff --git a/Sources/SKCore/CompilationDatabaseBuildSystem.swift b/Sources/SKCore/CompilationDatabaseBuildSystem.swift
index ef281822..c7dcd66c 100644
--- a/Sources/SKCore/CompilationDatabaseBuildSystem.swift
+++ b/Sources/SKCore/CompilationDatabaseBuildSystem.swift
@@ -73,7 +73,7 @@ extension CompilationDatabaseBuildSystem: BuildSystem {
   }
 
   /// We don't support change watching.
-  public func registerForChangeNotifications(for: DocumentURI) {}
+  public func registerForChangeNotifications(for: DocumentURI, language: Language) {}
 
   /// We don't support change watching.
   public func unregisterForChangeNotifications(for: DocumentURI) {}
diff --git a/Sources/SKCore/FallbackBuildSystem.swift b/Sources/SKCore/FallbackBuildSystem.swift
index a00f9306..afb30a9d 100644
--- a/Sources/SKCore/FallbackBuildSystem.swift
+++ b/Sources/SKCore/FallbackBuildSystem.swift
@@ -51,7 +51,7 @@ public final class FallbackBuildSystem: BuildSystem {
   }
 
   /// We don't support change watching.
-  public func registerForChangeNotifications(for: DocumentURI) {}
+  public func registerForChangeNotifications(for: DocumentURI, language: Language) {}
 
   /// We don't support change watching.
   public func unregisterForChangeNotifications(for: DocumentURI) {}
diff --git a/Sources/SKSwiftPMWorkspace/SwiftPMWorkspace.swift b/Sources/SKSwiftPMWorkspace/SwiftPMWorkspace.swift
index 5b263c86..face6f41 100644
--- a/Sources/SKSwiftPMWorkspace/SwiftPMWorkspace.swift
+++ b/Sources/SKSwiftPMWorkspace/SwiftPMWorkspace.swift
@@ -224,7 +224,7 @@ extension SwiftPMWorkspace: BuildSystem {
 
   /// Register the given file for build-system level change notifications, such as command
   /// line flag changes, dependency changes, etc.
-  public func registerForChangeNotifications(for uri: DocumentURI) {
+  public func registerForChangeNotifications(for uri: DocumentURI, language: Language) {
     // TODO: Support for change detection (via file watching)
   }
 
diff --git a/Sources/SourceKit/SourceKitServer.swift b/Sources/SourceKit/SourceKitServer.swift
index a9030e60..5ba30f17 100644
--- a/Sources/SourceKit/SourceKitServer.swift
+++ b/Sources/SourceKit/SourceKitServer.swift
@@ -426,7 +426,8 @@ extension SourceKitServer {
     workspace.documentManager.open(note.params)
 
     let textDocument = note.params.textDocument
-    workspace.buildSettings.registerForChangeNotifications(for: textDocument.uri)
+    workspace.buildSettings.registerForChangeNotifications(
+      for: textDocument.uri, language: textDocument.language)
 
     if let service = languageService(for: textDocument.uri, textDocument.language, in: workspace) {
       service.openDocument(note.params)
diff --git a/Tests/SKCoreTests/BuildServerBuildSystemTests.swift b/Tests/SKCoreTests/BuildServerBuildSystemTests.swift
index 011980a4..3a7e9026 100644
--- a/Tests/SKCoreTests/BuildServerBuildSystemTests.swift
+++ b/Tests/SKCoreTests/BuildServerBuildSystemTests.swift
@@ -59,7 +59,7 @@ final class BuildServerBuildSystemTests: XCTestCase {
     let expectation = XCTestExpectation(description: "\(fileUrl) settings updated")
     let buildSystemDelegate = TestDelegate(settingsExpectations: [DocumentURI(fileUrl): expectation])
     buildSystem.delegate = buildSystemDelegate
-    buildSystem.registerForChangeNotifications(for: DocumentURI(fileUrl))
+    buildSystem.registerForChangeNotifications(for: DocumentURI(fileUrl), language: .swift)
 
     XCTAssertEqual(XCTWaiter.wait(for: [expectation], timeout: 15), .completed)
   }
@@ -174,7 +174,7 @@ final class BuildServerBuildSystemTests: XCTestCase {
         data: .dictionary(["key": "value"])): expectation,
     ])
     buildSystem.delegate = buildSystemDelegate
-    buildSystem.registerForChangeNotifications(for: DocumentURI(fileUrl))
+    buildSystem.registerForChangeNotifications(for: DocumentURI(fileUrl), language: .swift)
 
     let result = XCTWaiter.wait(for: [expectation], timeout: 15)
     if result != .completed {
diff --git a/Tests/SourceKitTests/BuildSystemTests.swift b/Tests/SourceKitTests/BuildSystemTests.swift
index d23f181d..23209139 100644
--- a/Tests/SourceKitTests/BuildSystemTests.swift
+++ b/Tests/SourceKitTests/BuildSystemTests.swift
@@ -40,7 +40,7 @@ final class TestBuildSystem: BuildSystem {
     return buildSettingsByFile[uri]
   }
 
-  func registerForChangeNotifications(for uri: DocumentURI) {
+  func registerForChangeNotifications(for uri: DocumentURI, language: Language) {
     watchedFiles.insert(uri)
   }