diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPromise.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPromise.java
index 8b7ff52fec004d9869457e7e8d49c5780ae5ebc5..db83ac5f85b11e51bf639f764170106a24973749 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPromise.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPromise.java
@@ -238,7 +238,6 @@ public class RPromise extends RObject implements RTypedValue {
      * @see #execFrame
      */
     public final MaterializedFrame getFrame() {
-        assert !isEvaluated();
         return execFrame;
     }