diff --git a/cbuildbot/constants.py b/cbuildbot/constants.py
index d7f8304..f687c39 100644
--- a/cbuildbot/constants.py
+++ b/cbuildbot/constants.py
@@ -48,6 +48,8 @@
 WATERFALL_TRYBOT = 'chromiumos.tryserver'
 WATERFALL_RELEASE = 'chromeos_release'
 WATERFALL_BRANCH = 'chromeos.branch'
+# This waterfall is not yet using cidb.
+WATERFALL_CHROMIUM = 'chromiumos.chromium'
 
 CIDB_KNOWN_WATERFALLS = (WATERFALL_INTERNAL,
                          WATERFALL_EXTERNAL,
@@ -55,12 +57,15 @@
                          WATERFALL_RELEASE,
                          WATERFALL_BRANCH)
 
+ALL_WATERFALLS = CIDB_KNOWN_WATERFALLS + (WATERFALL_CHROMIUM,)
+
 # URLs to the various waterfalls.
 BUILD_DASHBOARD = 'http://build.chromium.org/p/chromiumos'
 BUILD_INT_DASHBOARD = 'https://uberchromegw.corp.google.com/i/chromeos'
 TRYBOT_DASHBOARD = 'https://uberchromegw.corp.google.com/i/chromiumos.tryserver'
 RELEASE_DASHBOARD = 'https://uberchromegw.corp.google.com/i/chromeos_release'
 BRANCH_DASHBOARD = 'https://uberchromegw.corp.google.com/i/chromeos.branch'
+CHROMIUM_DASHBOARD = 'https://uberchromegw.corp.google.com/i/chromiumos.chromium'
 
 # Waterfall to dashboard URL mapping.
 WATERFALL_TO_DASHBOARD = {
@@ -69,6 +74,7 @@
     WATERFALL_TRYBOT: TRYBOT_DASHBOARD,
     WATERFALL_RELEASE: RELEASE_DASHBOARD,
     WATERFALL_BRANCH: BRANCH_DASHBOARD,
+    WATERFALL_CHROMIUM: CHROMIUM_DASHBOARD,
 }
 
 # Builder status strings
diff --git a/cbuildbot/tree_status.py b/cbuildbot/tree_status.py
index a83d285..07cbda1 100644
--- a/cbuildbot/tree_status.py
+++ b/cbuildbot/tree_status.py
@@ -369,7 +369,7 @@
   """Return the dashboard (buildbot) URL for this run
 
   Args:
-    waterfall: One of constants.CIDB_KNOWN_WATERFALLS.
+    waterfall: One of constants.ALL_WATERFALLS
     builder_name: Builder name on buildbot dashboard.
     build_number: Build number for this validation attempt.
     stage: Link directly to a stage log, else use the general landing page.