diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 2237572dccc1..8af0ed819d44 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -36,6 +36,10 @@ The hotkey implementation has been changed to rely on scancodes over characters.
 A new 'unit placed' event has been added, making it possible to better implement certain kinds of event-driven behavior. [wiki=EventWML]See the wiki for details[/wiki].
 [/rasection]
 
+[rasection="Animated water performance"]
+The new animated water graphics introduced in 1.13.2 now consume considerably less memory. Also, water animations can now be toggled off independently from other terrain animations in Preferences->Display if they cause too much slowdown on large maps.
+[/rasection]
+
 ==========
 KNOWN BUGS
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