diff --git a/docs/UPDATING b/docs/UPDATING
index 4567846cb..052ba9c4a 100644
--- a/docs/UPDATING
+++ b/docs/UPDATING
@@ -1,3 +1,9 @@
+20120214:
+	Compiling everything with clang (previous entry) depends on a
+	relatively new clang package. Please make sure you have at
+	least clang-2.9nb3 installed. The symptom of an old clang being 
+	used is an assert(inited) firing, e.g. after rebuilding make.
+
 20120214:
 	Full switch to clang/ELF. ack is no longer supported.