diff --git a/template/templates/include_guard_cpp.txt b/template/templates/include_guard_cpp.txt
--- a/template/templates/include_guard_cpp.txt
+++ b/template/templates/include_guard_cpp.txt
@@ -1 +1 @@
-{% for ns in namespaces %}{{ ns|upper }}_{% endfor %}{{ name|upper }}_H
\ No newline at end of file
+{% for ns in namespaces %}{{ ns|upper }}_{% endfor %}{{ name|upper }}{{ include_guard_suffix|default:"_H" }}