diff --git a/srcpkgs/dpdk/patches/sphinx-4.0.patch b/srcpkgs/dpdk/patches/sphinx-4.0.patch
new file mode 100644
index 00000000000..cdee0fe98c1
--- /dev/null
+++ b/srcpkgs/dpdk/patches/sphinx-4.0.patch
@@ -0,0 +1,10 @@
+Index: dpdk-19.08/doc/guides/conf.py
+===================================================================
+--- dpdk-19.08.orig/doc/guides/conf.py
++++ dpdk-19.08/doc/guides/conf.py
+@@ -410,4 +410,4 @@ def setup(app):
+         # Process the numref references once the doctree has been created.
+         app.connect('doctree-resolved', process_numref)
+ 
+-    app.add_stylesheet('css/custom.css')
++    app.add_css_file('css/custom.css')