diff --git a/disciplines/units/sidimensionalunits.ttl b/disciplines/units/sidimensionalunits.ttl
index fe4bb9a5..c4b237a9 100644
--- a/disciplines/units/sidimensionalunits.ttl
+++ b/disciplines/units/sidimensionalunits.ttl
@@ -2294,4 +2294,15 @@ emmo:EMMO_ffbacbc4_c3be_4cc5_9539_94344e72f7a6 rdf:type owl:Class ;
                                                emmo:EMMO_967080e5_2f42_4eb2_a3a9_c58143e835f9 "The class of units with dimensionality 'SquarePressurePerSquareTime'."@en .
 
 
+###  https://w3id.org/emmo/disciplines/units/sidimensionalunits#EMMO_3c38a8b4_ed07_4185_8d9b_b57b9130c537
+:EMMO_3c38a8b4_ed07_4185_8d9b_b57b9130c537 rdf:type owl:Class ;
+                                           owl:equivalentClass [ rdf:type owl:Restriction ;
+                                                                 owl:onProperty emmo:EMMO_19d925d0_2cf1_40e5_a391_1a99d68409c9 ;
+                                                                 owl:hasValue "T0 L-4 M0 I0 Θ0 N0 J0"
+                                                               ] ;
+                                           rdfs:subClassOf emmo:EMMO_9895a1b4_f0a5_4167_ac5e_97db40b8bfcc ;
+                                           skos:prefLabel "PerLengthQuarticUnit"@en ;
+                                           emmo:EMMO_967080e5_2f42_4eb2_a3a9_c58143e835f9 "The class of units with physical dimensionality per length to the power of four."@en .
+
+
 ###  Generated by the OWL API (version 4.5.26.2023-07-17T20:34:13Z) https://github.com/owlcs/owlapi