diff --git a/brian2/units/fundamentalunits.py b/brian2/units/fundamentalunits.py
index 64ece0d06..a68db623c 100644
--- a/brian2/units/fundamentalunits.py
+++ b/brian2/units/fundamentalunits.py
@@ -2774,7 +2774,7 @@ def new_f(*args, **kwds):
                         value = newkeyset[k]
                         error_message = (
                             f"Function '{f.__name__}' "
-                            "expected a quantitity with unit "
+                            "expected a quantity with unit "
                             f"{unit} for argument '{k}' but got "
                             f"'{value}'"
                         )