diff --git a/language/predefined/typeerror.xml b/language/predefined/typeerror.xml
index 3090e4e478..1c40e32c17 100644
--- a/language/predefined/typeerror.xml
+++ b/language/predefined/typeerror.xml
@@ -21,7 +21,7 @@
     its corresponding declared parameter type. The second is where a value
     being returned from a function does not match the declared function return
     type. The third is where an invalid number of arguments are passed to a
-    built-in PHP function.
+    built-in PHP function (strict mode only).
   </para>
   </section>
 <!-- }}} -->