diff --git a/pandas/core/apply.py b/pandas/core/apply.py
index 8a28b30aecc03..6ab2f958b8730 100644
--- a/pandas/core/apply.py
+++ b/pandas/core/apply.py
@@ -1284,7 +1284,7 @@ def curried(x):
 
         if len(mapped) and isinstance(mapped[0], ABCSeries):
             warnings.warn(
-                "Returning a DataFrame from Series.apply when the supplied function"
+                "Returning a DataFrame from Series.apply when the supplied function "
                 "returns a Series is deprecated and will be removed in a future "
                 "version.",
                 FutureWarning,