diff --git a/pyerrors/input/hadrons.py b/pyerrors/input/hadrons.py
index 8297149c..692732f1 100644
--- a/pyerrors/input/hadrons.py
+++ b/pyerrors/input/hadrons.py
@@ -81,8 +81,8 @@ def read_meson_hd5(path, filestem, ens_id, meson='meson_0', idl=None):
         h5file = h5py.File(path + '/' + hd5_file, "r")
         if not tree + '/' + meson in h5file:
             raise Exception("Entry '" + meson + "' not contained in the files.")
-        raw_data = list(h5file[tree + '/' + meson + '/corr'])
-        real_data = [o[0] for o in raw_data]
+        raw_data = h5file[tree + '/' + meson + '/corr']
+        real_data = raw_data[:]["re"].astype(np.double)
         corr_data.append(real_data)
         if not infos:
             for k, i in h5file[tree + '/' + meson].attrs.items():