diff --git a/config.h.meson b/config.h.meson
index 61fa87a16..b8ac1fd23 100644
--- a/config.h.meson
+++ b/config.h.meson
@@ -427,9 +427,6 @@
 /* the target CPU */
 #mesondefine TARGET_CPU
 
-/* Define if we should poison deallocated memory */
-#mesondefine USE_POISONING
-
 /* Version number of package */
 #mesondefine VERSION