diff --git a/changelog b/changelog
index 8a5e4a11930..e53bff28533 100644
--- a/changelog
+++ b/changelog
@@ -36,7 +36,7 @@ Version 1.5.6+svn:
    * Added the 'round' key to [set_variable].
  * Miscellaneous and bug fixes:
    * New memory allocator introduced to the engine. It should
-     produce 5-10% savings in memory usage.
+     produce 5-10% savings in memory usage on 64-bit systems.
    * Included extra headers for certain g++ versions (patch #1113).
    * Fixed random memory corruption/assertion failure/massive leak due
      to story  screens.