diff --git a/docs/Makefile b/docs/Makefile
index 9252ed72..af4f22cb 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -3,7 +3,7 @@
 
 # You can set these variables from the command line, and also
 # from the environment for the first two.
-SPHINXOPTS    ?= -W --keep-going -n
+SPHINXOPTS    ?= --keep-going -n
 SPHINXBUILD   ?= sphinx-build
 SOURCEDIR     = source
 BUILDDIR      = build