diff --git a/tasks/modules/compile.js b/tasks/modules/compile.js
index 075ebe62..1fa207c7 100644
--- a/tasks/modules/compile.js
+++ b/tasks/modules/compile.js
@@ -138,12 +138,13 @@ function compileAllFiles(options, compilationInfo) {
         files = [referenceFile];
     }
     files = _.map(files, function (item) { return utils.possiblyQuotedRelativePath(item); });
-    var args = files.slice(0);
+    var args = [];
     exports.grunt.log.verbose.writeln("TypeScript path: " + tsc);
     if (tsconfig && tsconfig.passThrough) {
         args.push('--project', tsconfig.tsconfig);
     }
     else {
+        args = files.slice(0);
         if (options.sourceMap) {
             args.push('--sourcemap');
         }
@@ -485,4 +486,4 @@ function compileAllFiles(options, compilationInfo) {
     });
 }
 exports.compileAllFiles = compileAllFiles;
-//# sourceMappingURL=compile.js.map
\ No newline at end of file
+//# sourceMappingURL=compile.js.map
diff --git a/tasks/modules/compile.ts b/tasks/modules/compile.ts
index ebef7893..39a101f6 100644
--- a/tasks/modules/compile.ts
+++ b/tasks/modules/compile.ts
@@ -208,13 +208,14 @@ export function compileAllFiles(options: Partial<IGruntTSOptions>, compilationIn
     // Quote the files to compile. Needed for command line parsing by tsc
     files = _.map(files, item => utils.possiblyQuotedRelativePath(item));
 
-    let args: string[] = files.slice(0);
+    let args: string[] = [];
 
     grunt.log.verbose.writeln(`TypeScript path: ${tsc}`);
 
     if (tsconfig && tsconfig.passThrough) {
       args.push('--project', tsconfig.tsconfig);
     } else {
+      args = files.slice(0);
       if (options.sourceMap) {
           args.push('--sourcemap');
       }