diff --git a/src/services/jsDoc.ts b/src/services/jsDoc.ts
index 3369ac23223c2..a937294567b7d 100644
--- a/src/services/jsDoc.ts
+++ b/src/services/jsDoc.ts
@@ -1,4 +1,4 @@
-/* @internal */
+/* @internal */
 namespace ts.JsDoc {
     const jsDocTagNames = [
         "augments",
@@ -166,6 +166,7 @@ namespace ts.JsDoc {
         const lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
 
         const indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+        const isJavaScriptFile = hasJavaScriptFileExtension(sourceFile.fileName);
 
         let docParams = "";
         for (let i = 0, numParams = parameters.length; i < numParams; i++) {
@@ -173,8 +174,12 @@ namespace ts.JsDoc {
             const paramName = currentName.kind === SyntaxKind.Identifier ?
                 (<Identifier>currentName).text :
                 "param" + i;
-
-            docParams += `${indentationStr} * @param ${paramName}${newLine}`;
+            if (isJavaScriptFile) {
+                docParams += `${indentationStr} * @param {any} ${paramName}${newLine}`;
+            }
+            else {
+                docParams += `${indentationStr} * @param ${paramName}${newLine}`;
+            }
         }
 
         // A doc comment consists of the following