diff --git a/language/functions.xml b/language/functions.xml
index d97498f5a2d5..86a5f05200d3 100644
--- a/language/functions.xml
+++ b/language/functions.xml
@@ -89,9 +89,9 @@ if ($makefoo) {
 }
 
 /* Now we can safely call foo()
-   since $makefoo evaluated to true */
+   since function_exists('foo') evaluated to true */
 
-if ($makefoo) foo();
+if (function_exists('foo')) foo();
 
 function bar() 
 {