diff --git a/ext/pdo_sqlite/sqlite_driver.c b/ext/pdo_sqlite/sqlite_driver.c
index c1dcaa7fc2b..a5875f84f83 100644
--- a/ext/pdo_sqlite/sqlite_driver.c
+++ b/ext/pdo_sqlite/sqlite_driver.c
@@ -426,7 +426,6 @@ static int do_callback(struct pdo_sqlite_fci *fc, zval *cb, int argc, sqlite3_va
 		 * the context */
 		if (agg_context) {
 			if (Z_ISUNDEF(retval)) {
-				zval_ptr_dtor(&agg_context->val);
 				return FAILURE;
 			}
 			zval_ptr_dtor(Z_REFVAL(agg_context->val));
diff --git a/ext/pdo_sqlite/tests/gh13998.phpt b/ext/pdo_sqlite/tests/gh13998.phpt
new file mode 100644
index 00000000000..c87b4acdd21
--- /dev/null
+++ b/ext/pdo_sqlite/tests/gh13998.phpt
@@ -0,0 +1,25 @@
+--TEST--
+Fix GH-13998: Manage refcount of agg_context->val correctly
+--EXTENSIONS--
+pdo_sqlite
+--FILE--
+<?php
+$step = function () {
+    throw new Exception();
+};
+$finalize = function () {
+};
+
+$db = new PDO('sqlite::memory:');
+$db->query('CREATE TABLE test (a int, b int)');
+$stmt = $db->query('INSERT INTO test VALUES (1, 1), (2, 2), (3, 3)');
+$db->sqliteCreateAggregate('S', $step, $finalize, 1);
+
+try {
+    $db->query('SELECT S(a) FROM test');
+} catch (Exception $e) {
+    echo 'done!';
+}
+?>
+--EXPECT--
+done!