diff --git a/asv_bench/benchmarks/tslibs/timedelta.py b/asv_bench/benchmarks/tslibs/timedelta.py
index dcc73aefc6c7a..9d9689fcfa94b 100644
--- a/asv_bench/benchmarks/tslibs/timedelta.py
+++ b/asv_bench/benchmarks/tslibs/timedelta.py
@@ -20,7 +20,7 @@ def time_from_int(self):
         Timedelta(123456789)
 
     def time_from_unit(self):
-        Timedelta(1, unit="d")
+        Timedelta(1, unit="D")
 
     def time_from_components(self):
         Timedelta(