diff --git a/docs/projectconf.rst b/docs/projectconf.rst
index df508ed5..b33f0ea7 100644
--- a/docs/projectconf.rst
+++ b/docs/projectconf.rst
@@ -226,7 +226,7 @@ processes:
     * - Format
       - Scope
       - Description
-    * - ``Wp,option``
+    * - ``-Wp,option``
       - CPPFLAGS
       - Bypass the compiler driver and pass *option* directly  through to the
         preprocessor