diff --git a/src/version.h b/src/version.h
index 2ca88085a3..1fc264bd9f 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "29 Jan 2012"
+#define LAMMPS_VERSION "31 Jan 2012"