diff --git a/doc/develop/spl.rst b/doc/develop/spl.rst
index 0a3e572..4bb48e6 100644
--- a/doc/develop/spl.rst
+++ b/doc/develop/spl.rst
@@ -121,6 +121,8 @@
 also find the previous and next phase and get the phase name.
 
 
+.. _fdtgrep_filter:
+
 Device tree
 -----------
 The U-Boot device tree is filtered by the fdtgrep tools during the build