diff --git a/platform/lang-api/src/com/intellij/ide/projectView/ProjectViewNode.java b/platform/lang-api/src/com/intellij/ide/projectView/ProjectViewNode.java
index 474ccc011d33..e7bfc33f8af5 100644
--- a/platform/lang-api/src/com/intellij/ide/projectView/ProjectViewNode.java
+++ b/platform/lang-api/src/com/intellij/ide/projectView/ProjectViewNode.java
@@ -165,11 +165,32 @@ public abstract class ProjectViewNode <Value> extends AbstractTreeNode<Value> {
     return 0;
   }
 
+  /**
+   * When nodes are sorted by type all objects with same weigh will be sorted using
+   * some common algorithm (e.g alpha comparator). This method allows to perform custom
+   * sorting for such objects. And default comparison will be applied only if nodes are equal
+   * from custom comparator's point of view. Also comparison will be applied only if both objects
+   * have not null comparable keys.
+   * @return Comparable object.
+   */
   @Nullable
   public Comparable getTypeSortKey() {
     return null;
   }
 
+  /**
+   * When nodes aren't sorted by type all objects with same weigh will be sorted using
+   * some common algorithm (e.g alpha comparator). This method allows to perform custom
+   * sorting for such objects. And default comparison will be applied only if nodes are equal
+   * from custom comparator's point of view. Also comparison will be applied only if both objects
+   * have not null comparable keys.
+   * @return Comparable object.
+   */
+  @Nullable
+  public Comparable getSortKey() {
+    return null;
+  }
+
   @Nullable
   public String getQualifiedNameSortKey() {
     return null;
diff --git a/platform/lang-impl/src/com/intellij/ide/projectView/impl/GroupByTypeComparator.java b/platform/lang-impl/src/com/intellij/ide/projectView/impl/GroupByTypeComparator.java
index ac88f0939c08..8fa21d67fb2f 100644
--- a/platform/lang-impl/src/com/intellij/ide/projectView/impl/GroupByTypeComparator.java
+++ b/platform/lang-impl/src/com/intellij/ide/projectView/impl/GroupByTypeComparator.java
@@ -58,10 +58,17 @@ public class GroupByTypeComparator implements Comparator<NodeDescriptor> {
       }
 
       if (isSortByType()) {
-        Comparable typeSortKey1 = node1.getTypeSortKey();
-        Comparable typeSortKey2 = node2.getTypeSortKey();
+        final Comparable typeSortKey1 = node1.getTypeSortKey();
+        final Comparable typeSortKey2 = node2.getTypeSortKey();
         if (typeSortKey1 != null && typeSortKey2 != null) {
-          int result = typeSortKey1.compareTo(typeSortKey2);
+          final int result = typeSortKey1.compareTo(typeSortKey2);
+          if (result != 0) return result;
+        }
+      } else {
+        final Comparable typeSortKey1 = node1.getSortKey();
+        final Comparable typeSortKey2 = node2.getSortKey();
+        if (typeSortKey1 != null && typeSortKey2 != null) {
+          final int result = typeSortKey1.compareTo(typeSortKey2);
           if (result != 0) return result;
         }
       }