diff --git a/CHANGES.md b/CHANGES.md
index 1bac335ea..50612ea07 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -45,6 +45,7 @@ ADMB-12.2
 * Add batch file create-admb-command-prompt.bat to create shortcut with full instead of relative path.  [See Issue #135](https://github.com/admb-project/admb/issues/135)
 * Able to use FINAL_SECTION without REPORT_SECTION. [See Issue #133](https://github.com/admb-project/admb/issues/133)
 * Fixed core dump when deallocating already freed memory from xpools.  [See Issue #138](https://github.com/admb-project/admb/issues/138)
+    __Note: USE_VECTOR_SHAPE_POOL for memory pool is now disabled by default.__
 * Support adstring_array in DATA_SECTION.  [See Issue #143](https://github.com/admb-project/admb/issues/143)
 * Applied fixes from @yukio-takeuchi.
   * [Issue #122](https://github.com/admb-project/admb/issues/122)
diff --git a/src/linad99/fvar.hpp b/src/linad99/fvar.hpp
index 7458fe764..a3de17683 100644
--- a/src/linad99/fvar.hpp
+++ b/src/linad99/fvar.hpp
@@ -106,8 +106,7 @@ Macro definitions.
   #include <tiny_ad.hpp>
 #endif
 
-
-#define USE_VECTOR_SHAPE_POOL
+//#define USE_VECTOR_SHAPE_POOL
 
 #if defined(USE_DDOUBLE)
 #   include <qd/qd.h>