diff --git a/TOOLS/travis-rebuild-website b/TOOLS/travis-rebuild-website
index 8d04fb506c..02bf2c2564 100755
--- a/TOOLS/travis-rebuild-website
+++ b/TOOLS/travis-rebuild-website
@@ -10,6 +10,11 @@ if [ "x$TRAVIS_BRANCH" != "xmaster" ]; then
   exit;
 fi
 
+TRAVIS_COMMIT_RANGE=${TRAVIS_COMMIT_RANGE:-HEAD^..}
+if git diff --quiet --name-only --exit-code "$TRAVIS_COMMIT_RANGE" DOCS/; then
+  exit;
+fi
+
 body='{
 "request": {
   "branch":"master"