diff --git a/src/USER-COLVARS/colvarproxy_lammps.h b/src/USER-COLVARS/colvarproxy_lammps.h
index 94c3bacdd4..74f7193784 100644
--- a/src/USER-COLVARS/colvarproxy_lammps.h
+++ b/src/USER-COLVARS/colvarproxy_lammps.h
@@ -15,7 +15,7 @@
 #include <iostream>
 
 #ifndef COLVARPROXY_VERSION
-#define COLVARPROXY_VERSION "2015-04-01"
+#define COLVARPROXY_VERSION "2015-04-02"
 #endif
 
 /* struct for packed data communication of coordinates and forces. */