diff --git a/idea/idea-analysis/src/org/jetbrains/jet/plugin/framework/JsLibraryStdDetectionUtil.java b/idea/idea-analysis/src/org/jetbrains/jet/plugin/framework/JsLibraryStdDetectionUtil.java
index cbe9a272d3a..702f1720b1c 100644
--- a/idea/idea-analysis/src/org/jetbrains/jet/plugin/framework/JsLibraryStdDetectionUtil.java
+++ b/idea/idea-analysis/src/org/jetbrains/jet/plugin/framework/JsLibraryStdDetectionUtil.java
@@ -17,11 +17,14 @@
 package org.jetbrains.jet.plugin.framework;
 
 import com.intellij.openapi.util.io.JarUtil;
+import com.intellij.openapi.vfs.StandardFileSystems;
 import com.intellij.openapi.vfs.VfsUtilCore;
 import com.intellij.openapi.vfs.VirtualFile;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.utils.LibraryUtils;
 import org.jetbrains.jet.utils.PathUtil;
 
+import java.io.File;
 import java.util.List;
 import java.util.jar.Attributes;
 
@@ -33,7 +36,12 @@ public class JsLibraryStdDetectionUtil {
         }
 
         for (VirtualFile root : classesRoots) {
-            if (root.getName().equals(PathUtil.JS_LIB_JAR_NAME)) {
+            if (root.getFileSystem().getProtocol() != StandardFileSystems.JAR_PROTOCOL) continue;
+
+            VirtualFile jar = VfsUtilCore.getVirtualFileForJar(root);
+            assert jar != null;
+
+            if (LibraryUtils.isJsRuntimeLibrary(new File(jar.getPath()))) {
                 assert JsHeaderLibraryDetectionUtil.isJsHeaderLibraryDetected(classesRoots) : "StdLib should also be detected as headers library";
 
                 return JarUtil.getJarAttribute(VfsUtilCore.virtualToIoFile(root), Attributes.Name.IMPLEMENTATION_VERSION);