diff --git a/docs/module_structure.rst b/docs/module_structure.rst
index aa8cbb7..7334b53 100644
--- a/docs/module_structure.rst
+++ b/docs/module_structure.rst
@@ -304,7 +304,7 @@
   }
 
   config("define_options") {
-    defines = [ "-DPW_FOO_INPUT_BUFFER_SIZE_BYTES=256" ]
+    defines = [ "PW_FOO_INPUT_BUFFER_SIZE_BYTES=256" ]
   }
 
   # This configuration sets PW_FOO_INPUT_BUFFER_SIZE_BYTES in a header file.