diff --git a/doc/Makefile b/doc/Makefile
index b1fcb6c4..00a895a4 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -11,7 +11,7 @@ PAPEROPT_a4     = -D latex_paper_size=a4
 PAPEROPT_letter = -D latex_paper_size=letter
 ALLSPHINXOPTS   = -d build/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) source
 DEST = build
-.PHONY: all help clean html dirhtml pickle json htmlhelp qthelp latex changes linkcheck doctest gitwash
+.PHONY: all help clean html dirhtml pickle json htmlhelp qthelp latex changes linkcheck doctest gitwash gh-pages
 
 all: html