diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/RContext.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/RContext.java
index 5a06b31c28c93a6848d3d58ebfbefbf8163bdb30..0774e6e3fa49de90c17bed0bc567d66e353671d4 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/RContext.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/RContext.java
@@ -464,6 +464,7 @@ public final class RContext extends ExecutionContext {
     /**
      * Return the {@link RFunction} for the builtin {@code name}.
      */
+    @TruffleBoundary
     public static RFunction lookupBuiltin(String name) {
         return builtinLookup.lookupBuiltin(name);
     }