diff --git a/.jenkins.d/README.md b/.jenkins.d/README.md
index b1bd93a..f6e3167 100644
--- a/.jenkins.d/README.md
+++ b/.jenkins.d/README.md
@@ -29,3 +29,5 @@
   * empty: default build process
   * `code-coverage` (Linux OS is assumed): debug build with tests and code coverage analysis
   * `limited-build`: only a single debug build with tests
+
+- `WAF_JOBS`: number of parallel build jobs used by waf, defaults to 1.