diff --git a/src/build/virtual-target.jam b/src/build/virtual-target.jam
index b8b10e13f..8c5d62a62 100644
--- a/src/build/virtual-target.jam
+++ b/src/build/virtual-target.jam
@@ -26,10 +26,10 @@ import utility ;
 #                                       / \
 #                                      +-+-+
 #                                        |
-#    +---------------------+     +---------+------------+
+#    +---------------------+     +-------+--------------+
 #    | action              |     | abstract-file-target |
 #    +=====================|   * +======================+
-#    | action-name         |  +--| action               |
+#    | action-name         |  +--+ action               |
 #    | properties          |  |  +----------------------+
 #    +---------------------+--+  | actualize-action()   |
 #    | actualize()         |0..1 +-----------+----------+
@@ -40,7 +40,7 @@ import utility ;
 #           |                               / \
 #           ^                              +-+-+
 #          / \                               |
-#         +-+-+                +-------------|-------------+
+#         +-+-+                +-------------+-------------+
 #           |                  |                           |
 #           |           +------+---------------+  +--------+-------------+
 #           |           | file-target          |  | searched-lib-target  |
@@ -48,9 +48,9 @@ import utility ;
 #           |           | actualize-location() |  | actualize-location() |
 #           |           +----------------------+  +----------------------+
 #           |
-#         +--------------------------------+
+#         +-+------------------------------+
 #         |                                |
-#    +---------------------+     +---------------------+
+#    +----+----------------+     +---------+-----------+
 #    | compile-action      |     | link-action         |
 #    +=====================+     +=====================+
 #    | adjust-properties() |     | adjust-properties() |