diff --git a/errors_map.hpp b/errors_map.hpp
new file mode 100644
index 0000000..1389509
--- /dev/null
+++ b/errors_map.hpp
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <map>
+#include <string>
+#include <vector>
+
+using EType = std::string;
+using Error = std::string;
+using ErrorList = std::vector<Error>;
+using ErrorMap = std::map<EType, ErrorList>;
+
+extern const ErrorMap errorMap;
diff --git a/errors_map.mako.hpp b/errors_map.mako.cpp
similarity index 67%
rename from errors_map.mako.hpp
rename to errors_map.mako.cpp
index b04f00e..b8246cf 100644
--- a/errors_map.mako.hpp
+++ b/errors_map.mako.cpp
@@ -1,11 +1,7 @@
 ## This file is a template.  The comment below is emitted
 ## into the rendered file; feel free to edit this file.
 // !!! WARNING: This is a GENERATED Code..Please do NOT Edit !!!
-#include <map>
-using EType = std::string;
-using Error = std::string;
-using ErrorList = std::vector<Error>;
-using ErrorMap = std::map<EType, std::vector<Error>>;
+#include "errors_map.hpp"
 
 const ErrorMap errorMap = {
 % for key, errors in errDict.items():
diff --git a/errors_map_gen.py b/errors_map_gen.py
index a7fac0d..9fafae9 100755
--- a/errors_map_gen.py
+++ b/errors_map_gen.py
@@ -19,15 +19,23 @@
         default="errors_watch.yaml",
         help="input errors watch yaml file to parse",
     )
+
+    parser.add_argument(
+        "-c",
+        "--cpp_file",
+        dest="cpp_file",
+        default="errors_map.cpp",
+        help="output cpp file",
+    )
     args = parser.parse_args()
 
     with open(os.path.join(script_dir, args.errors_map_yaml), "r") as fd:
         yamlDict = yaml.safe_load(fd)
 
-        # Render the mako template
-        template = os.path.join(script_dir, "errors_map.mako.hpp")
+        # Render the mako template for cpp file
+        template = os.path.join(script_dir, "errors_map.mako.cpp")
         t = Template(filename=template)
-        with open("errors_map.hpp", "w") as fd:
+        with open(args.cpp_file, "w") as fd:
             fd.write(t.render(errDict=yamlDict))
 
 
diff --git a/meson.build b/meson.build
index e25247a..1ba3e32 100644
--- a/meson.build
+++ b/meson.build
@@ -122,26 +122,25 @@
 configure_file(configuration : conf_data,
                output : 'config.h'
               )
-
 subdir('xyz/openbmc_project/Dump/Internal/Create')
 
 python = find_program('python3')
 errors_map_gen_file_loc = meson.project_source_root()
 errors_map_gen_file_loc += '/errors_map_gen.py'
 
-errors_map_hpp = custom_target(
-                    'errors_map.hpp',
+errors_map_cpp = custom_target(
+                    'errors_map.cpp',
                     command : [
                         python,
                         errors_map_gen_file_loc,
                         '-i',
                         get_option('ERROR_MAP_YAML')
                     ],
-                    depend_files : [ 'errors_map.mako.hpp',
+                    depend_files : [ 'errors_map.mako.cpp',
                                      'errors_map_gen.py',
                                      get_option('ERROR_MAP_YAML')
                                    ],
-                    output : 'errors_map.hpp'
+                    output : 'errors_map.cpp'
                  )
 
 phosphor_dump_manager_sources = [
@@ -151,7 +150,7 @@
         'dump_manager_main.cpp',
         'dump_serialize.cpp',
         'elog_watch.cpp',
-        errors_map_hpp,
+        errors_map_cpp,
         common_hpp,
         server_hpp,
         server_cpp,