diff --git a/doc/nrf/conf.py b/doc/nrf/conf.py
index e45eff57fb8..79c0e178a77 100644
--- a/doc/nrf/conf.py
+++ b/doc/nrf/conf.py
@@ -129,6 +129,11 @@
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
+# Additional lexer for Pygments (syntax highlighting)
+from lexer.DtsLexer import DtsLexer
+from sphinx.highlighting import lexers
+lexers['DTS'] = DtsLexer()
+
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False