diff --git a/configure.ac b/configure.ac
index f6d25f334..3115504e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1592,7 +1592,7 @@ fi
 [enable_uaf_detection="0"]
 )
 if test "x$enable_uaf_detection" = "x1" ; then
-  AC_DEFINE([JEMALLOC_UAF_DETECTION], [ ])
+  AC_DEFINE([JEMALLOC_UAF_DETECTION], [ ], ["enable UAF"])
 fi
 AC_SUBST([enable_uaf_detection])