diff --git a/lib/Target/ARM/README.txt b/lib/Target/ARM/README.txt
index f3377f91ab9..3e8c54a05a8 100644
--- a/lib/Target/ARM/README.txt
+++ b/lib/Target/ARM/README.txt
@@ -537,3 +537,7 @@ Split out LDR (literal) from normal ARM LDR instruction. Also consider spliting
 LDR into imm12 and so_reg forms. This allows us to clean up some code. e.g.
 ARMLoadStoreOptimizer does not need to look at LDR (literal) and LDR (so_reg)
 while ARMConstantIslandPass only need to worry about LDR (literal).
+
+//===---------------------------------------------------------------------===//
+
+We need to fix constant isel for ARMv6t2 to use MOVT.