diff --git a/Makefile b/Makefile
index f59c1ce4f0379592970e36588da2a4ae360ff208..6038a8737bfa8f1b32d8555b46980b2a074adc24 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ SOURCES         := cmp_tool.c \
 		    $(SOURCEDIR)/decmp.c \
 		    $(SOURCEDIR)/rdcu_pkt_to_file.c \
 		    $(SOURCEDIR)/cmp_guess.c \
-		    $(SOURCEDIR)/cmp_tool_lib.c \
+		    $(SOURCEDIR)/cmp_io.c \
 		    $(SOURCEDIR)/cmp_entity.c
 TARGET          := cmp_tool
 
diff --git a/cmp_tool.c b/cmp_tool.c
index 24587f6bbe0205ee4d259a302fc4e43e320e6f62..0cf2acd961580d5fabcd8d0798fab7ef7e2f1bff 100755
--- a/cmp_tool.c
+++ b/cmp_tool.c
@@ -25,7 +25,7 @@
 #include <getopt.h>
 #include <time.h>
 
-#include "include/cmp_tool_lib.h"
+#include "include/cmp_io.h"
 #include "include/cmp_icu.h"
 #include "include/decmp.h"
 #include "include/cmp_guess.h"
diff --git a/include/cmp_tool_lib.h b/include/cmp_io.h
similarity index 98%
rename from include/cmp_tool_lib.h
rename to include/cmp_io.h
index 40ad0be5961ab721950ca831fd330595a2dc1494..1ad04e5d6b0263fb637da904fb25bc2005d849e8 100644
--- a/include/cmp_tool_lib.h
+++ b/include/cmp_io.h
@@ -1,5 +1,5 @@
 /**
- * @file   cmp_tool_lib.h
+ * @file   cmp_io.h
  * @author Johannes Seelig (johannes.seelig@univie.ac.at)
  * @author Dominik Loidolt (dominik.loidolt@univie.ac.at),
  * @date   2020
diff --git a/lib/cmp_tool_lib.c b/lib/cmp_io.c
similarity index 99%
rename from lib/cmp_tool_lib.c
rename to lib/cmp_io.c
index 6028d00a5328ad79610f119be7d074a2a05faefc..f47ff8d60c6e194ea3275f682725beb09bab3385 100644
--- a/lib/cmp_tool_lib.c
+++ b/lib/cmp_io.c
@@ -1,5 +1,5 @@
 /**
- * @file   cmp_tool_lib.c
+ * @file   cmp_io.c
  * @author Johannes Seelig (johannes.seelig@univie.ac.at)
  * @author Dominik Loidolt (dominik.loidolt@univie.ac.at),
  * @date   2020
@@ -13,6 +13,8 @@
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
+ *
+ * @brief compression tool Input/Output library
  */
 
 #include <stdio.h>
@@ -22,7 +24,7 @@
 #include <ctype.h>
 #include <sys/stat.h>
 
-#include "../include/cmp_tool_lib.h"
+#include "../include/cmp_io.h"
 #include "../include/cmp_support.h"
 #include "../include/rdcu_cmd.h"
 #include "../include/byteorder.h"