diff --git a/pandas/core/resample.py b/pandas/core/resample.py
index e9b2bacd9e1df..7d37a9f1d5113 100644
--- a/pandas/core/resample.py
+++ b/pandas/core/resample.py
@@ -986,7 +986,7 @@ def interpolate(
         downcast : optional, 'infer' or None, defaults to None
             Downcast dtypes if possible.
 
-            .. deprecated::2.1.0
+            .. deprecated:: 2.1.0
 
         ``**kwargs`` : optional
             Keyword arguments to pass on to the interpolating function.