diff --git a/reference/apc/ini.xml b/reference/apc/ini.xml
index b530862414..08100e77e2 100644
--- a/reference/apc/ini.xml
+++ b/reference/apc/ini.xml
@@ -126,9 +126,9 @@
      </row>
      <row>
       <entry><link linkend="ini.apc.slam-defense">apc.slam_defense</link></entry>
-      <entry>"0"</entry>
+      <entry>"1"</entry>
       <entry>PHP_INI_SYSTEM</entry>
-      <entry>Available since APC 3.0.0.</entry>
+      <entry>Available since APC 3.0.0. Prior to APC 3.1.4, the default value was <literal>"0"</literal> (disabled).</entry>
      </row>
      <row>
       <entry><link linkend="ini.apc.file-update-protection">apc.file_update_protection</link></entry>