diff --git a/swash/processing/sws_npz.py b/swash/processing/sws_npz.py
index 1404c64..24581b0 100644
--- a/swash/processing/sws_npz.py
+++ b/swash/processing/sws_npz.py
@@ -29,8 +29,8 @@ n_x = bathy.index.size
 
 log.info(f"Reading swash output from '{sws_out}'")
 botl_np = read_nohead_scalar(sws_out.joinpath("botl.dat"), n_x)
-dep = np.maximum(0, read_nohead_scalar(sws_out.joinpath("dep.dat"), n))
-vel = read_nohead_vect(sws_out.joinpath("vel.dat"), n)
+dep = np.maximum(0, read_nohead_scalar(sws_out.joinpath("dep.dat"), n_x))
+vel = read_nohead_vect(sws_out.joinpath("vel.dat"), n_x)
 
 botl.savez_compressed(inp.joinpath("botl"))
 dep.savez_compressed(inp.joinpath("dep"))