diff --git a/src/mdevaluate/__init__.py b/src/mdevaluate/__init__.py
index 8fe6d5a..921a6cd 100644
--- a/src/mdevaluate/__init__.py
+++ b/src/mdevaluate/__init__.py
@@ -38,7 +38,7 @@ def open(
             used, if there is exactly one in the directoy.
         trajectory (opt.): Descriptor of the trajectory (xtc or trr file).
         nojump (opt.):
-            If nojump matrixes should be generated. They will alwyas be loaded
+            If nojump matrices should be generated. They will alwyas be loaded
             if present
         index_file (opt.): Descriptor of the index file (ndx file).
         charges (opt.):
@@ -97,9 +97,9 @@ def open(
     coords = coordinates.Coordinates(frames, atom_subset=atom_set)
     if nojump:
         try:
-            frames.nojump_matrixes
+            frames.nojump_matrices
         except reader.NojumpError:
-            reader.generate_nojump_matrixes(coords)
+            reader.generate_nojump_matrices(coords)
     return coords