diff --git a/config/libc_glibc.in b/config/libc_glibc.in
index c0454d2b..fbade0ff 100644
--- a/config/libc_glibc.in
+++ b/config/libc_glibc.in
@@ -205,7 +205,10 @@ config LIBC_ADDONS_LIST
     default ""
     depends on LIBC_ADDONS
     help
-      Extra addons to include in glibc.
+      Extra addons to include in glibc. Space separated list.
+
+      You need to specify neither linuxthreads nor nptl, as they are added
+      automagically for you depending on the threading model you choosed
+      earlier.
       
       Eg.: crypt        (for very old glibces)
-           linuxthreads (for the linuxthreads implementation of threads)