diff --git a/modules/modbus/inc/ciaaModbus.h b/modules/modbus/inc/ciaaModbus.h
index 66ef71ec..0da5fe07 100755
--- a/modules/modbus/inc/ciaaModbus.h
+++ b/modules/modbus/inc/ciaaModbus.h
@@ -53,6 +53,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141113 v0.0.1 initials initial
  */
 
diff --git a/modules/modbus/inc/ciaaModbus_ascii.h b/modules/modbus/inc/ciaaModbus_ascii.h
index b1de91bf..465560c4 100755
--- a/modules/modbus/inc/ciaaModbus_ascii.h
+++ b/modules/modbus/inc/ciaaModbus_ascii.h
@@ -55,6 +55,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.2 GMuro   New Modbus implementation
  * 20140623 v0.0.1 MaCe    first functional version
  */
diff --git a/modules/modbus/inc/ciaaModbus_gateway.h b/modules/modbus/inc/ciaaModbus_gateway.h
index 191305e2..15f186d1 100755
--- a/modules/modbus/inc/ciaaModbus_gateway.h
+++ b/modules/modbus/inc/ciaaModbus_gateway.h
@@ -54,6 +54,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.1 GMuro   initial version
  */
 
diff --git a/modules/modbus/inc/ciaaModbus_master.h b/modules/modbus/inc/ciaaModbus_master.h
index 483394f0..c6ddef19 100644
--- a/modules/modbus/inc/ciaaModbus_master.h
+++ b/modules/modbus/inc/ciaaModbus_master.h
@@ -54,6 +54,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.1 GMuro   initial version
  */
 
diff --git a/modules/modbus/inc/ciaaModbus_protocol.h b/modules/modbus/inc/ciaaModbus_protocol.h
index a035384f..d0d23985 100755
--- a/modules/modbus/inc/ciaaModbus_protocol.h
+++ b/modules/modbus/inc/ciaaModbus_protocol.h
@@ -53,6 +53,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20140906 v0.0.1 initials initial
  */
 
diff --git a/modules/modbus/inc/ciaaModbus_slave.h b/modules/modbus/inc/ciaaModbus_slave.h
index b4de6afb..9025741e 100755
--- a/modules/modbus/inc/ciaaModbus_slave.h
+++ b/modules/modbus/inc/ciaaModbus_slave.h
@@ -55,6 +55,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.2 GMuro   New Modbus implementation
  * 20140623 v0.0.1 MaCe    first functional version
  */
diff --git a/modules/modbus/inc/ciaaModbus_transport.h b/modules/modbus/inc/ciaaModbus_transport.h
index 44ab1c61..75ce0a41 100755
--- a/modules/modbus/inc/ciaaModbus_transport.h
+++ b/modules/modbus/inc/ciaaModbus_transport.h
@@ -53,6 +53,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.1 GMuro   initial version
  */
 
diff --git a/modules/modbus/src/ciaaModbus_ascii.c b/modules/modbus/src/ciaaModbus_ascii.c
index 10a42ef3..dae12d91 100755
--- a/modules/modbus/src/ciaaModbus_ascii.c
+++ b/modules/modbus/src/ciaaModbus_ascii.c
@@ -52,6 +52,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.2 GMuro   New Modbus implementation
  * 20140623 v0.0.1 MaCe    first functional version
  */
diff --git a/modules/modbus/src/ciaaModbus_gateway.c b/modules/modbus/src/ciaaModbus_gateway.c
index c29c7da2..52e3c3e7 100755
--- a/modules/modbus/src/ciaaModbus_gateway.c
+++ b/modules/modbus/src/ciaaModbus_gateway.c
@@ -50,6 +50,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.1 GMuro   initial version
  */
 
diff --git a/modules/modbus/src/ciaaModbus_master.c b/modules/modbus/src/ciaaModbus_master.c
index 4b2f747b..49658414 100644
--- a/modules/modbus/src/ciaaModbus_master.c
+++ b/modules/modbus/src/ciaaModbus_master.c
@@ -50,6 +50,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.1 GMuro   initial version
  */
 
diff --git a/modules/modbus/src/ciaaModbus_slave.c b/modules/modbus/src/ciaaModbus_slave.c
index 510ad195..29738c2c 100755
--- a/modules/modbus/src/ciaaModbus_slave.c
+++ b/modules/modbus/src/ciaaModbus_slave.c
@@ -51,6 +51,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.2 GMuro   New Modbus implementation
  * 20140623 v0.0.1 MaCe    first functional version
  */
diff --git a/modules/modbus/src/ciaaModbus_transport.c b/modules/modbus/src/ciaaModbus_transport.c
index 3ef0bcb7..6c487de3 100755
--- a/modules/modbus/src/ciaaModbus_transport.c
+++ b/modules/modbus/src/ciaaModbus_transport.c
@@ -50,6 +50,7 @@
 /*
  * modification history (new versions first)
  * -----------------------------------------------------------
+ * 20150604 v0.8.1 GMuro   replace numbers for macros
  * 20141108 v0.0.1 GMuro   initial version
  */