diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index bff6a3fe0..f1f3785d6 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -35,6 +35,7 @@ Change Log
 - [ADDED] option to use a second tap changer for the trafo element
 - [CHANGED] parameters of function merge_internal_net_and_equivalent_external_net()
 - [FIXED] :code:`convert_format.py`: update the attributes of the characteristic objects to match the new characteristic
+- [FIXED] fixed the wrong id numbers for pypower powerflow algorithms fdxb and fdbx
 - [FIXED] additional arguments from mpc saved to net._options: create "_options" if it does not exist
 - [CHANGED] cim2pp: extracted getting default classes, added generic setting datatypes from CGMES XMI schema
 - [ADDED] function :code:`getOTDF` to obtain Outage Transfer Distribution Factors, that can be used to analyse outages using the DC approximation of the power system
diff --git a/pandapower/pf/runpf_pypower.py b/pandapower/pf/runpf_pypower.py
index 6972a7739..5b912eb22 100644
--- a/pandapower/pf/runpf_pypower.py
+++ b/pandapower/pf/runpf_pypower.py
@@ -78,7 +78,7 @@ def _get_options(options, **kwargs):
     max_iteration = options["max_iteration"]
 
     # algorithms implemented within pypower
-    algorithm_pypower_dict = {'nr': 1, 'fdbx': 2, 'fdxb': 3, 'gs': 4}
+    algorithm_pypower_dict = {'nr': 1, 'fdxb': 2, 'fdbx': 3, 'gs': 4}
 
     ppopt = ppoption(ENFORCE_Q_LIMS=enforce_q_lims, PF_TOL=tolerance_mva,
                      PF_ALG=algorithm_pypower_dict[algorithm], **kwargs)