diff --git a/src/ecmascript/quickjs/element.c b/src/ecmascript/quickjs/element.c
index 751ed7478..a115c6c9b 100644
--- a/src/ecmascript/quickjs/element.c
+++ b/src/ecmascript/quickjs/element.c
@@ -2846,6 +2846,10 @@ js_element_contains(JSContext *ctx, JSValueConst this_val, int argc, JSValueCons
 		return JS_FALSE;
 	}
 
+	if (el == el2) {
+		dom_node_unref(el);
+		return JS_TRUE;
+	}
 	bool result_set = false;
 	bool result = false;
 
diff --git a/test/ecmascript/assert/element.contains.html b/test/ecmascript/assert/element.contains.html
index 3d8065da9..43b4aa9d6 100644
--- a/test/ecmascript/assert/element.contains.html
+++ b/test/ecmascript/assert/element.contains.html
@@ -26,8 +26,10 @@ function myFunction() {
   var span2 = document.getElementById("mySPAN2");
   var div = document.getElementById("myDIV").contains(span);
   var div2 = document.getElementById("myDIV").contains(span2);
+  var itself = document.getElementById("mySPAN").contains(span);
   console.assert(div, 'myDIV contains mySPAN');
   console.assert(!div2, '!myDIV contains mySPAN2');
+  console.assert(itself, 'element contains itself');
 }
 
 console.error('element.contains.html');