diff --git a/src/version.h b/src/version.h
index a26abb1341..8a1f331852 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "8 Dec 2011"
+#define LAMMPS_VERSION "9 Dec 2011"