diff --git a/build/shared/revisions.txt b/build/shared/revisions.txt
index 4ab810245..30b1f65f8 100644
--- a/build/shared/revisions.txt
+++ b/build/shared/revisions.txt
@@ -1,4 +1,4 @@
-ARDUINO 1.8.1
+ARDUINO 1.8.1 - 2017.01.09
 
 [ide]
 * Fixed font rendering not anti-aliased on Windows (regression)