diff --git a/ConfigSpace/hyperparameters/uniform_float.pyx b/ConfigSpace/hyperparameters/uniform_float.pyx
index e073662a..a846d63d 100644
--- a/ConfigSpace/hyperparameters/uniform_float.pyx
+++ b/ConfigSpace/hyperparameters/uniform_float.pyx
@@ -121,7 +121,7 @@ cdef class UniformFloatHyperparameter(FloatHyperparameter):
                 default_value = np.exp((np.log(self.lower) + np.log(self.upper)) / 2.)
             else:
                 default_value = (self.lower + self.upper) / 2.
-        default_value = np.round(float(default_value), 10)
+        default_value = float(np.round(float(default_value), 10))
 
         if self.is_legal(default_value):
             return default_value