diff --git a/examples/nemd/in.nemd b/examples/nemd/in.nemd
index a4aee102b7..c4a9b6e859 100644
--- a/examples/nemd/in.nemd
+++ b/examples/nemd/in.nemd
@@ -2,7 +2,7 @@
 
 units		lj
 atom_style	atomic
-dimension	2d
+dimension	2
 
 lattice		sq2 0.8442
 region		box prism 0 10 0 8 -0.5 0.5 0 0 0