diff --git a/platform/platform-api/src/com/intellij/util/net/HttpConfigurable.java b/platform/platform-api/src/com/intellij/util/net/HttpConfigurable.java
index 537a2cbfa324..847f4cfbdbdc 100644
--- a/platform/platform-api/src/com/intellij/util/net/HttpConfigurable.java
+++ b/platform/platform-api/src/com/intellij/util/net/HttpConfigurable.java
@@ -55,6 +55,7 @@ import java.util.*;
 @State(
   name = "HttpConfigurable",
   storages = {
+    // we use two storages due to backward compatibility, see http://crucible.labs.intellij.net/cru/CR-IC-5142
     @Storage(file = StoragePathMacros.APP_CONFIG + "/other.xml"),
     @Storage(file = StoragePathMacros.APP_CONFIG + "/proxy.settings.xml")
   },