diff --git a/platform/util/src/com/intellij/util/lang/ClassPath.java b/platform/util/src/com/intellij/util/lang/ClassPath.java
index 7a78abc05712..0d12eaf72158 100644
--- a/platform/util/src/com/intellij/util/lang/ClassPath.java
+++ b/platform/util/src/com/intellij/util/lang/ClassPath.java
@@ -76,7 +76,10 @@ public class ClassPath {
     push(urls);
   }
 
-  /** @deprecated to be removed in IDEA 15 */
+  /**
+   * @deprecated Adding additional urls to classpath at runtime could lead to hard-to-debug errors
+   */
+  @Deprecated
   void addURL(URL url) {
     push(Collections.singletonList(url));
   }
diff --git a/platform/util/src/com/intellij/util/lang/UrlClassLoader.java b/platform/util/src/com/intellij/util/lang/UrlClassLoader.java
index 20215a5f6178..5f8e2a8ed15f 100644
--- a/platform/util/src/com/intellij/util/lang/UrlClassLoader.java
+++ b/platform/util/src/com/intellij/util/lang/UrlClassLoader.java
@@ -195,8 +195,12 @@ public class UrlClassLoader extends ClassLoader {
     }
   }
 
-  /** @deprecated to be removed in IDEA 15 */
+  /**
+   * @deprecated Adding additional urls to classloader at runtime could lead to hard-to-debug errors
+   * <b>Note:</b> Used via reflection because of classLoaders incompatibility
+   */
   @SuppressWarnings({"unused", "deprecation"})
+  @Deprecated
   public void addURL(URL url) {
     getClassPath().addURL(url);
     myURLs.add(url);