diff --git a/doc/Makefile b/doc/Makefile
index a600f375c..7fb0155f6 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -31,5 +31,5 @@ gh-pages: html
 	mkdir $(GH_PAGES)/test
 	cp -R ../html/* $(GH_PAGES)/test
 	git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git add -A .
-	git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git commit --allow-empty -m "Updated doc from commit $(TRAVIS_COMMIT)."
+	-git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git commit -m "Updated doc from commit $(TRAVIS_COMMIT)."
 	git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git push