diff --git a/lib/src/units/energy_density/energy_density_unit.dart b/lib/src/units/energy_density/energy_density_unit.dart
index fdbee5c..4e03b6e 100644
--- a/lib/src/units/energy_density/energy_density_unit.dart
+++ b/lib/src/units/energy_density/energy_density_unit.dart
@@ -31,6 +31,8 @@ enum EnergyDensityUnit implements LinearUnit<EnergyDensityUnit> {
     'J/m³': joulePerCubicMeter,
     'J/L': joulePerLiter,
     'Wh/L': wattHourPerLiter,
+    'J/l': joulePerLiter,
+    'Wh/l': wattHourPerLiter,
   };
 
   /// Full word-form names and non-SI abbreviations matched **case-insensitively**.