diff --git a/src/vim9expr.c b/src/vim9expr.c
index c65fc79..88d9ec1 100644
--- a/src/vim9expr.c
+++ b/src/vim9expr.c
@@ -383,7 +383,12 @@
 	    // uf_name[] only being 4 characters.
 	    char_u *ufname = (char_u *)fp->uf_name;
 	    if (STRNCMP(name, ufname, len) == 0 && ufname[len] == NUL)
-		return generate_FUNCREF(cctx, fp, NULL);
+	    {
+		if (type->tt_type == VAR_OBJECT
+		     && (cl->class_flags & (CLASS_INTERFACE | CLASS_EXTENDED)))
+		    return generate_FUNCREF(cctx, fp, cl, i, NULL);
+		return generate_FUNCREF(cctx, fp, NULL, 0, NULL);
+	    }
 	}
 
 	semsg(_(e_member_not_found_on_object_str_str), cl->class_name, name);
@@ -1308,7 +1313,7 @@
 	// The function reference count will be 1.  When the ISN_FUNCREF
 	// instruction is deleted the reference count is decremented and the
 	// function is freed.
-	return generate_FUNCREF(cctx, ufunc, NULL);
+	return generate_FUNCREF(cctx, ufunc, NULL, 0, NULL);
     }
 
     func_ptr_unref(ufunc);