diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index 812712bc..2d2eae23 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -12,6 +12,8 @@ Upcoming Release
 
 * Carriers of generators can now be excluded from aggregation in clustering network and simplify network.
 
+* Fix EQ constraint for the case no hydro inflow is available
+
 PyPSA-Eur 0.6.1 (20th September 2022)
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