diff --git a/NEWS b/NEWS
index f40c6dfd8da6..9599aa0f8a8d 100644
--- a/NEWS
+++ b/NEWS
@@ -71,6 +71,10 @@ PHP                                                                        NEWS
   . Fixed off-by-one in phpdbg_safe_class_lookup() causing class lookups to
     always fail during phpdbg's signal-safe interruption path. (jorgsowa)
 
+- Reflection:
+  . Fixed bug GH-22683 (Reflection(Class)Constant::__toString() should not warn
+    on NAN conversions). (Khaled Alam)
+
 - Session:
   . Fixed bug GH-21314 (Different session garbage collector behavior between
     PHP 8.3 and PHP 8.5). (jorgsowa)
diff --git a/ext/reflection/php_reflection.c b/ext/reflection/php_reflection.c
index f04bd020b770..13df0b2bbb4d 100644
--- a/ext/reflection/php_reflection.c
+++ b/ext/reflection/php_reflection.c
@@ -609,6 +609,8 @@ static void _const_string(smart_str *str, const char *name, zval *value, const c
 		smart_str_append(str, ZSTR_KNOWN(ZEND_STR_ARRAY_CAPITALIZED));
 	} else if (Z_TYPE_P(value) == IS_STRING) {
 		smart_str_append(str, Z_STR_P(value));
+	} else if (Z_TYPE_P(value) == IS_DOUBLE) {
+		smart_str_append_double(str, Z_DVAL_P(value), (int) EG(precision), false);
 	} else {
 		zend_string *tmp_value_str;
 		zend_string *value_str = zval_get_tmp_string(value, &tmp_value_str);
@@ -641,6 +643,8 @@ static void _class_const_string(smart_str *str, const zend_string *name, zend_cl
 		smart_str_appends(str, "Array");
 	} else if (Z_TYPE(c->value) == IS_OBJECT) {
 		smart_str_appends(str, "Object");
+	} else if (Z_TYPE(c->value) == IS_DOUBLE) {
+		smart_str_append_double(str, Z_DVAL(c->value), (int) EG(precision), false);
 	} else {
 		zend_string *tmp_value_str;
 		zend_string *value_str = zval_get_tmp_string(&c->value, &tmp_value_str);
diff --git a/ext/reflection/tests/gh22683.phpt b/ext/reflection/tests/gh22683.phpt
new file mode 100644
index 000000000000..9280a3f4a685
--- /dev/null
+++ b/ext/reflection/tests/gh22683.phpt
@@ -0,0 +1,33 @@
+--TEST--
+GH-22683 (Reflection(Class)Constant::__toString() should not warn on NAN conversions)
+--FILE--
+<?php
+
+set_error_handler(function ($errno, $errstr) {
+    echo "Unexpected warning: $errstr\n";
+    return true;
+});
+
+echo new ReflectionConstant('NAN');
+echo new ReflectionConstant('INF');
+
+class Demo {
+    public const MY_NAN = NAN;
+    public const MY_INF = INF;
+    public const MY_FLOAT = 1.5;
+    public const MY_WHOLE = 2.0;
+}
+
+echo new ReflectionClassConstant(Demo::class, 'MY_NAN');
+echo new ReflectionClassConstant(Demo::class, 'MY_INF');
+echo new ReflectionClassConstant(Demo::class, 'MY_FLOAT');
+echo new ReflectionClassConstant(Demo::class, 'MY_WHOLE');
+
+?>
+--EXPECT--
+Constant [ <persistent> float NAN ] { NAN }
+Constant [ <persistent> float INF ] { INF }
+Constant [ public float MY_NAN ] { NAN }
+Constant [ public float MY_INF ] { INF }
+Constant [ public float MY_FLOAT ] { 1.5 }
+Constant [ public float MY_WHOLE ] { 2 }