diff --git a/src/version.h b/src/version.h
index 86983c6d9a..77b9c30012 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "13 Dec 2011"
+#define LAMMPS_VERSION "15 Dec 2011"