diff --git a/pandas/_libs/lib.pyx b/pandas/_libs/lib.pyx
index c5fb20596d7b6..4e451fc33b055 100644
--- a/pandas/_libs/lib.pyx
+++ b/pandas/_libs/lib.pyx
@@ -1313,7 +1313,7 @@ def infer_dtype(value: object, skipna: bool = True) -> str:
     'boolean'
 
     >>> infer_dtype([True, False, np.nan])
-    'mixed'
+    'boolean'
 
     >>> infer_dtype([pd.Timestamp('20130101')])
     'datetime'