diff --git a/source/vibe/core/core.d b/source/vibe/core/core.d
index 62a0890..4f9c0d6 100644
--- a/source/vibe/core/core.d
+++ b/source/vibe/core/core.d
@@ -314,8 +314,18 @@ void setIdleHandler(bool delegate() @safe nothrow del)
 
 	Note that the maximum size of all args must not exceed `maxTaskParameterSize`.
 */
+Task runTask(ARGS...)(void delegate(ARGS) @safe task, auto ref ARGS args)
+{
+	return runTask_internal!((ref tfi) { tfi.set(task, args); });
+}
+///
+Task runTask(ARGS...)(void delegate(ARGS) @system task, auto ref ARGS args)
+@system {
+	return runTask_internal!((ref tfi) { tfi.set(task, args); });
+}
+/// ditto
 Task runTask(CALLABLE, ARGS...)(CALLABLE task, auto ref ARGS args)
-	if (is(typeof(CALLABLE.init(ARGS.init))))
+	if (!is(CALLABLE : void delegate(ARGS)) && is(typeof(CALLABLE.init(ARGS.init))))
 {
 	return runTask_internal!((ref tfi) { tfi.set(task, args); });
 }