diff --git a/ext/pcre/tests/bug78338.phpt b/ext/pcre/tests/bug78338.phpt
index ec5bf1b946f..2080264b77f 100644
--- a/ext/pcre/tests/bug78338.phpt
+++ b/ext/pcre/tests/bug78338.phpt
@@ -1,5 +1,7 @@
 --TEST--
 Bug #78338 (Array cross-border reading in PCRE)
+--INI--
+pcre.jit=1
 --FILE--
 <?php
 $string = hex2bin('2f5c583f3d3f223f3536ff3636ffffffff36a8a8a83636367a7a7a7a3d2aff2f0a');