diff --git a/src/services/services.ts b/src/services/services.ts
index 024a7fe7122..d3810d30059 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -305,10 +305,19 @@ module ts {
 
 
 module TypeScript.Services {
+    export interface Logger {
+        information(): boolean;
+        debug(): boolean;
+        warning(): boolean;
+        error(): boolean;
+        fatal(): boolean;
+        log(s: string): void;
+    }
+
     //
     // Public interface of the host of a language service instance.
     //
-    export interface LanguageServiceHost extends TypeScript.Logger {
+    export interface LanguageServiceHost extends Logger {
         getCompilationSettings(): ts.CompilerOptions;
         getScriptFileNames(): string[];
         getScriptVersion(fileName: string): number;
@@ -1201,7 +1210,6 @@ module TypeScript.Services {
     }
 
     export function createLanguageService(host: LanguageServiceHost, documentRegistry: IDocumentRegistry): LanguageService {
-        var logger: TypeScript.Logger = host;
         var _syntaxTreeCache: SyntaxTreeCache = new SyntaxTreeCache(host);
         var formattingRulesProvider: Formatting.RulesProvider;
         var hostCache: HostCache; // A cache of all the information about the files on the host side.
@@ -1386,7 +1394,7 @@ module TypeScript.Services {
             var sourceUnit = document.sourceUnit();
 
             if (CompletionHelpers.isCompletionListBlocker(document.syntaxTree().sourceUnit(), position)) {
-                logger.log("Returning an empty list because completion was blocked.");
+                host.log("Returning an empty list because completion was blocked.");
                 return null;
             }
 
@@ -1793,7 +1801,7 @@ module TypeScript.Services {
         function getFormattingManager(filename: string, options: FormatCodeOptions) {
             // Ensure rules are initialized and up to date wrt to formatting options
             if (formattingRulesProvider == null) {
-                formattingRulesProvider = new TypeScript.Services.Formatting.RulesProvider(logger);
+                formattingRulesProvider = new TypeScript.Services.Formatting.RulesProvider(host);
             }
 
             formattingRulesProvider.ensureUpToDate(options);
diff --git a/src/services/shims.ts b/src/services/shims.ts
index d70515d9755..5c334993156 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -40,7 +40,7 @@ module TypeScript.Services {
     //
     // Public interface of the host of a language service shim instance.
     //
-    export interface LanguageServiceShimHost extends TypeScript.Logger {
+    export interface LanguageServiceShimHost extends Logger {
         getCompilationSettings(): string;
 
         // Returns a JSON encoded value of the type:
@@ -249,7 +249,7 @@ module TypeScript.Services {
         return settings;
     }
 
-    function logInternalError(logger: TypeScript.Logger, err: Error) {
+    function logInternalError(logger: Logger, err: Error) {
         logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
     }
 
@@ -389,7 +389,7 @@ module TypeScript.Services {
         }
     }
 
-    function simpleForwardCall(logger: TypeScript.Logger, actionDescription: string, action: () => any): any {
+    function simpleForwardCall(logger: Logger, actionDescription: string, action: () => any): any {
         logger.log(actionDescription);
         var start = Date.now();
         var result = action();
@@ -405,7 +405,7 @@ module TypeScript.Services {
         return result;
     }
 
-    function forwardJSONCall(logger: TypeScript.Logger, actionDescription: string, action: () => any): string {
+    function forwardJSONCall(logger: Logger, actionDescription: string, action: () => any): string {
         try {
             var result = simpleForwardCall(logger, actionDescription, action);
             return JSON.stringify({ result: result });
@@ -430,7 +430,7 @@ module TypeScript.Services {
     }
 
     class LanguageServiceShimObject extends ShimBase implements LanguageServiceShim {
-        private logger: TypeScript.Logger;
+        private logger: Logger;
 
         constructor(factory: ShimFactory,
             private host: LanguageServiceShimHost,