diff --git a/docs/RELEASE-HOWTO b/docs/RELEASE-HOWTO
index 8f2435a2d2..0fdf128cfd 100644
--- a/docs/RELEASE-HOWTO
+++ b/docs/RELEASE-HOWTO
@@ -36,8 +36,10 @@ Without those packages make distcheck will *not* pass.
     * forgotten source files
     * new symbols missing from .symbols files
     * symbols that are exported by should be private (static or _-prefixed)
-    * symbols that cause PLT entries. This is usually caused by using
-      function without including the header
+    * symbols that cause PLT entries. This is either caused by using
+      a in the same library function without including the header or by
+      using a function from a different library, which is not yet allowed
+      by the filter in pltcheck.sh
 
  5) If this is a devel release, make sure that the docs for new symbols
     are in good shape. Look at the -unused.txt files and add stuff found