diff --git a/src/oxrse_unit_conv/units.py b/src/oxrse_unit_conv/units.py
index 881af78..9d42e5a 100644
--- a/src/oxrse_unit_conv/units.py
+++ b/src/oxrse_unit_conv/units.py
@@ -24,6 +24,7 @@
 lb = pound
 
 # ampere
+ampere = Unit(name='ampere', abbr='A', si=ampere, to_si_fun=lambda n: n)
 
 # kelvin