diff --git a/configure.in b/configure.in
index 98ce026e33fc..50634070c2f2 100644
--- a/configure.in
+++ b/configure.in
@@ -7251,9 +7251,6 @@ if test -z "$MOZ_MEMORY"; then
   esac
 else
   AC_DEFINE(MOZ_MEMORY)
-  if test -n "$NIGHTLY_BUILD"; then
-    MOZ_JEMALLOC4=1
-  fi
   if test -n "$MOZ_JEMALLOC4"; then
     AC_DEFINE(MOZ_JEMALLOC4)
   fi