diff --git a/pandas/_libs/tslibs/timedeltas.pyx b/pandas/_libs/tslibs/timedeltas.pyx
index c13b0c4cd78a5..f5efd6922d6d7 100644
--- a/pandas/_libs/tslibs/timedeltas.pyx
+++ b/pandas/_libs/tslibs/timedeltas.pyx
@@ -2068,6 +2068,9 @@ class Timedelta(_Timedelta):
 
         disallow_ambiguous_unit(unit)
 
+        cdef:
+            int64_t new_value
+
         # GH 30543 if pd.Timedelta already passed, return it
         # check that only value is passed
         if isinstance(value, _Timedelta):