diff --git a/History.rdoc b/History.rdoc
index 8586e7e92..b1cbd3b2f 100644
--- a/History.rdoc
+++ b/History.rdoc
@@ -5,6 +5,7 @@ Bugfixes:
 - Fix wrong handling of socket writability on Windows introduced in #417.
   This caused starvation in conn.put_copy_data.
 - Fix error in PG.version_string(true). #419
+- Fix a regression in pg 1.3.0 where Ruby 2.x busy-looping any fractional seconds for every wait. #420
 
 Enhancements: