diff --git a/config.default.yaml b/config.default.yaml
index 1a8a8a9f..5218bc22 100755
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -684,8 +684,8 @@ solving:
       threads: 4
       lpmethod: 4 # barrier
       solutiontype: 2 # non basic solution, ie no crossover
-      barrier_convergetol: 1.e-5
-      feasopt_tolerance: 1.e-6
+      barrier.convergetol: 1.e-5
+      feasopt.tolerance: 1.e-6
     cbc-default: {} # Used in CI
     glpk-default: {} # Used in CI
 
diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index 426ab9ef..e668e92e 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -10,8 +10,7 @@ Release Notes
 Upcoming Release
 ================
 
-* new feature or bugfix
-
+* Bugfix: Correct typo in the CPLEX solver configuration in ``config.default.yaml``.
 
 PyPSA-Eur 0.8.0 (18th March 2023)
 =================================