change ID to RC6
diff --git a/releng.control/config.xml b/releng.control/config.xml
index 74c5330..2b2683f 100644
--- a/releng.control/config.xml
+++ b/releng.control/config.xml
@@ -278,7 +278,7 @@
                     value="S" />
                 <property
                     name="buildId"
-                    value="1.5RC5a" />
+                    value="1.5RC6" />
                 <property
                     name="mapVersionTag"
                     value="HEAD" />