diff --git a/doc/mem.txt b/doc/mem.txt
index cce1d536d..f96d8fa18 100644
--- a/doc/mem.txt
+++ b/doc/mem.txt
@@ -1,5 +1,4 @@
 /**
 \defgroup mem Memory functions
-@{
+\ingroup lib
 */
-/** @} */