diff --git a/doc/doxygen/riot.doxyfile b/doc/doxygen/riot.doxyfile
index 0eee110a96..b71ebd6630 100644
--- a/doc/doxygen/riot.doxyfile
+++ b/doc/doxygen/riot.doxyfile
@@ -228,7 +228,7 @@ TAB_SIZE               = 4
 # "Side Effects:". You can put \n's in the value part of an alias to insert
 # newlines.
 
-ALIASES                =
+ALIASES                = experimental="@warning <strong class=\"text-danger\">This feature is experimental!</strong>\n"
 
 # This tag can be used to specify a number of word-keyword mappings (TCL only).
 # A mapping has the form "name=value". For example adding "class=itcl::class"