diff --git a/src/mdevaluate/pbc.py b/src/mdevaluate/pbc.py
index 771ffd6..8b60721 100644
--- a/src/mdevaluate/pbc.py
+++ b/src/mdevaluate/pbc.py
@@ -153,7 +153,7 @@ def nojump(frame: CoordinateFrame, usecache: bool = True) -> CoordinateFrame:
             delta
             + np.array(
                 np.vstack(
-                    [m[i0 : abstep + 1].sum(axis=0) for m in reader.nojump_matrixes]
+                    [m[i0 : abstep + 1].sum(axis=0) for m in reader.nojump_matrices]
                 ).T
             )
             * frame.box.diagonal()
@@ -169,7 +169,7 @@ def nojump(frame: CoordinateFrame, usecache: bool = True) -> CoordinateFrame:
                 np.vstack(
                     [
                         m[: frame.step + 1, selection].sum(axis=0)
-                        for m in reader.nojump_matrixes
+                        for m in reader.nojump_matrices
                     ]
                 ).T
             )