diff --git a/Implab/Safe.cs b/Implab/Safe.cs
--- a/Implab/Safe.cs
+++ b/Implab/Safe.cs
@@ -86,6 +86,21 @@ namespace Implab
         }
 
         [DebuggerStepThrough]
+        public static IPromise InvokePromise(Func<IPromise> action) {
+            ArgumentNotNull(action, "action");
+
+            var p = new Promise();
+            try {
+                action();
+                p.Resolve();
+            } catch (Exception err) {
+                p.Reject(err);
+            }
+
+            return p;
+        }
+
+        [DebuggerStepThrough]
         public static IPromise<T> InvokePromise<T>(Func<IPromise<T>> action) {
             ArgumentNotNull(action, "action");