diff --git a/lib/Target/ARM/README-Thumb2.txt b/lib/Target/ARM/README-Thumb2.txt
index 651d39311e0..e7c2552d9e4 100644
--- a/lib/Target/ARM/README-Thumb2.txt
+++ b/lib/Target/ARM/README-Thumb2.txt
@@ -1,3 +1,6 @@
 //===---------------------------------------------------------------------===//
 // Random ideas for the ARM backend (Thumb2 specific).
 //===---------------------------------------------------------------------===//
+
+Make sure jumptable destinations are below the jumptable in order to make use
+of tbb / tbh.