diff --git a/src/bob/fusion/base/algorithm/GMM.py b/src/bob/fusion/base/algorithm/GMM.py
index b4b6d6109ff2a13b76341b686bc74624cbc0577b..071383fa6946a888cc9024b923f3fcbc36b1acce 100644
--- a/src/bob/fusion/base/algorithm/GMM.py
+++ b/src/bob/fusion/base/algorithm/GMM.py
@@ -84,6 +84,6 @@ class GMM(AlgorithmBob):
     def decision_function(self, scores):
         return np.fromiter(
             (self.machine.log_likelihood(s) for s in scores),
-            np.float,
+            float,
             scores.shape[0],
         )