diff --git a/pandas/core/tools/datetimes.py b/pandas/core/tools/datetimes.py
index 32dc3c1f3e8f2..7b136fa29ecea 100644
--- a/pandas/core/tools/datetimes.py
+++ b/pandas/core/tools/datetimes.py
@@ -637,7 +637,7 @@ def to_datetime(
         datetime strings, and if it can be inferred, switch to a faster
         method of parsing them. In some cases this can increase the parsing
         speed by ~5-10x.
-    origin : scalar, default is 'unix'
+    origin : scalar, default 'unix'
         Define the reference date. The numeric values would be parsed as number
         of units (defined by `unit`) since this reference date.