diff --git a/NEWS b/NEWS
index b62200e4c06a..a2b199651322 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-15375 (Nested "yield from" skips items after a valid() or
     next() call on the inner generator). (iliaal)
 
+- Intl:
+  . Fixed a crash when converting with a cloned UConverter that uses
+    toUCallback/fromUCallback. (iliaal)
+
 - Opcache:
   . Fixed opcache.protect_memory race under ZTS. (realFlowControl)
 
diff --git a/ext/intl/converter/converter.c b/ext/intl/converter/converter.c
index 759db5e18873..6ba2ed9a08e7 100644
--- a/ext/intl/converter/converter.c
+++ b/ext/intl/converter/converter.c
@@ -961,6 +961,9 @@ static zend_object *php_converter_clone_object(zend_object *object) {
 
 	zend_objects_clone_members(&(objval->obj), &(oldobj->obj));
 
+	php_converter_resolve_callback(&objval->to_cache, &objval->obj, ZEND_STRL("toUCallback"));
+	php_converter_resolve_callback(&objval->from_cache, &objval->obj, ZEND_STRL("fromUCallback"));
+
 	/* Newly cloned object deliberately does not inherit error state from original object */
 
 	return retval;
diff --git a/ext/intl/tests/uconverter_clone_callback.phpt b/ext/intl/tests/uconverter_clone_callback.phpt
new file mode 100644
index 000000000000..140841b455e5
--- /dev/null
+++ b/ext/intl/tests/uconverter_clone_callback.phpt
@@ -0,0 +1,24 @@
+--TEST--
+Cloned UConverter resolves toUCallback/fromUCallback on the clone
+--EXTENSIONS--
+intl
+--FILE--
+<?php
+
+class MyConverter extends UConverter {
+    public int $hits = 0;
+
+    public function toUCallback($reason, $source, $codeUnits, &$error): string|int|array|null {
+        $this->hits++;
+        return parent::toUCallback($reason, $source, $codeUnits, $error);
+    }
+}
+
+$orig = new MyConverter('ascii', 'utf-8');
+$clone = clone $orig;
+$clone->convert("irregul\xC1\xA1r");
+echo $clone->hits > 0 ? "ok\n" : "no callback\n";
+
+?>
+--EXPECT--
+ok