diff --git a/src/lib/eina/eina_promise.c b/src/lib/eina/eina_promise.c
index 1cbc9f274f..1fbac60f65 100644
--- a/src/lib/eina/eina_promise.c
+++ b/src/lib/eina/eina_promise.c
@@ -998,6 +998,15 @@ eina_promise_data_get(const Eina_Promise *p)
    return (void *)p->data;
 }
 
+EAPI void
+eina_promise_data_set(Eina_Promise *p,
+                      void *data)
+{
+   EINA_SAFETY_ON_NULL_RETURN(p);
+   p->data = data;
+}
+
+
 static Eina_Value
 _eina_future_cb_easy(void *data, const Eina_Value value,
                      const Eina_Future *dead_future)
diff --git a/src/lib/eina/eina_promise.h b/src/lib/eina/eina_promise.h
index 9c8fc3a8a2..caca9574a9 100644
--- a/src/lib/eina/eina_promise.h
+++ b/src/lib/eina/eina_promise.h
@@ -553,6 +553,17 @@ EAPI Eina_Promise *eina_promise_new(Eina_Future_Scheduler *scheduler, Eina_Promi
  */
 EAPI void *eina_promise_data_get(const Eina_Promise *p) EINA_ARG_NONNULL(1);
 
+/**
+ * Sets the data attached to the promise.
+ *
+ * Set the data passed to eina_promise_new().
+ * @see eina_promise_new()
+ * @see eina_promise_resolve()
+ * @see eina_promise_reject()
+ * @see eina_promise_as_value()
+ */
+EAPI void eina_promise_data_set(Eina_Promise *p, void *data) EINA_ARG_NONNULL(1);
+
 /**
  * Resolves a promise.
  *