diff --git a/freqtrade/optimize/hyperopt/hyperopt_interface.py b/freqtrade/optimize/hyperopt/hyperopt_interface.py
index 34ee09e90..aae1d22e7 100644
--- a/freqtrade/optimize/hyperopt/hyperopt_interface.py
+++ b/freqtrade/optimize/hyperopt/hyperopt_interface.py
@@ -48,7 +48,7 @@ class IHyperOpt(ABC):
         "NSGAIIISampler", "QMCSampler" or an instance of a class
         inheriting from BaseSampler (from optuna.samplers).
         """
-        return "NSGAIISampler"
+        return "NSGAIIISampler"
 
     def generate_roi_table(self, params: dict) -> dict[int, float]:
         """