diff --git a/freqtrade/configuration/config_schema.py b/freqtrade/configuration/config_schema.py
index f50334938..61726a863 100644
--- a/freqtrade/configuration/config_schema.py
+++ b/freqtrade/configuration/config_schema.py
@@ -1026,8 +1026,8 @@ CONF_SCHEMA = {
                         "Number of historical candles to use for computing target (label) "
                         "statistics from prediction data, instead of from the training dataset."
                     ),
-                    "type": "boolean",
-                    "default": False,
+                    "type": "integer",
+                    "default": 0,
                 },
                 "data_kitchen_thread_count": {
                     "description": (