diff --git a/doc/doxygen/riot.doxyfile b/doc/doxygen/riot.doxyfile
index 6bf18e0536..1f3eb3b090 100644
--- a/doc/doxygen/riot.doxyfile
+++ b/doc/doxygen/riot.doxyfile
@@ -32,7 +32,7 @@ DOXYFILE_ENCODING      = UTF-8
 # title of most generated pages and in a few other places.
 # The default value is: My Project.
 
-PROJECT_NAME           =
+PROJECT_NAME           = "RIOT OS"
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number. This
 # could be handy for archiving the generated documentation or if some version