diff --git a/doc/source/conf.py b/doc/source/conf.py
index 6693499c..38e81147 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -23,6 +23,7 @@
 # serve to show the default.
 
 import pbr.version
+import os
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -39,7 +40,8 @@ import pbr.version
 # ones.
 extensions = [
     'sphinx.ext.autodoc',
-    'oslosphinx'
+    'oslosphinx',
+    'sphinxmark'
 ]
 
 # Add any paths that contain templates here, relative to this directory.
@@ -303,3 +305,15 @@ texinfo_documents = [
 
 # If true, do not generate a @detailmenu in the "Top" node's menu.
 # texinfo_no_detailmenu = False
+
+watermark = os.popen("git branch --contains $(git rev-parse HEAD) | awk -F/ '/stable/ {print $2}'").read().strip(' \n\t').capitalize()
+if watermark == "":
+  watermark = "Pre-release"
+
+# -- Options for sphinxmark -----------------------------------------------
+sphinxmark_enable = True
+sphinxmark_div = 'docs-body'
+sphinxmark_image = 'text'
+sphinxmark_text = watermark
+sphinxmark_text_color = (128, 128, 128)
+sphinxmark_text_size = 70
diff --git a/test-requirements.txt b/test-requirements.txt
index 672f6153..3501a573 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -13,3 +13,4 @@ sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
 oslosphinx>=4.7.0 # Apache-2.0
 doc8 # Apache-2.0
 reno>=1.8.0 # Apache2
+sphinxmark>=0.1.14  # Apache-2.0