diff --git a/readme.txt b/readme.txt
index 61476d9e7..888b5b631 100644
--- a/readme.txt
+++ b/readme.txt
@@ -55,10 +55,10 @@ Compiling
     gnu make
     ========
         To build Cppcheck with rules (pcre dependency):
-            make
+            make HAVE_RULES=yes
 
         To build Cppcheck without rules (no dependencies):
-            make HAVE_RULES=no
+            make
 
     g++ (for experts)
     =================