diff --git a/bin/b2json b/bin/b2json
index 43c94bc..fb6e3b0 100755
--- a/bin/b2json
+++ b/bin/b2json
@@ -20,6 +20,8 @@
 require 'rubygems'
 require 'bson'
 
+# Note that this will not properly round-trip in all cases
+# from the output generated by j2bson.
 begin
 require 'yajl'
 rescue LoadError
diff --git a/bin/j2bson b/bin/j2bson
index 20c4905..b776b40 100755
--- a/bin/j2bson
+++ b/bin/j2bson
@@ -25,6 +25,9 @@ require 'bson'
 #
 # We use json/pure because json/ext is broken with BSON::OrderedHash
 # (probably for the same reasons that we can't use YAJL).
+#
+# Note that, at the moment, this will not properly round-trip
+# in all cases from the output generated by b2json.
 begin
 require 'json/pure'  # broken with 'json/ext'
 rescue LoadError