diff --git a/platform/lang-api/src/com/intellij/lang/ASTNode.java b/platform/lang-api/src/com/intellij/lang/ASTNode.java
index 0734ac0c6b2e..78f70fcc5bed 100644
--- a/platform/lang-api/src/com/intellij/lang/ASTNode.java
+++ b/platform/lang-api/src/com/intellij/lang/ASTNode.java
@@ -108,16 +108,16 @@ public interface ASTNode extends UserDataHolder {
   ASTNode getLastChildNode();
 
   /**
-   * Returns the previous sibling of this node in the tree.
+   * Returns the next sibling of this node in the tree.
    *
-   * @return the previous sibling node.
+   * @return the next sibling node.
    */
   ASTNode getTreeNext();
 
   /**
-   * Returns the next sibling of this node in the tree.
+   * Returns the previous sibling of this node in the tree.
    *
-   * @return the next sibling node.
+   * @return the previous sibling node.
    */
   ASTNode getTreePrev();