diff --git a/README.build b/README.build
index d62e6cb..a2e0ba6 100644
--- a/README.build
+++ b/README.build
@@ -98,9 +98,9 @@
 
 Then to set an option and build (for example turn off SSL support):
 
-	cmake -DWITH_SSL=0 ..
+	cmake -DLWS_WITH_SSL=0 ..
 or
-	cmake -DWITH_SSL:BOOL=OFF ..
+	cmake -DLWS_WITH_SSL:BOOL=OFF ..
 
 Unix GUI
 --------