diff --git a/setup.cfg b/setup.cfg
index 959bf5358..447178d80 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -92,6 +92,7 @@ mistral.expression.functions =
     tasks = mistral.utils.expression_utils:tasks_
     uuid = mistral.utils.expression_utils:uuid_
     yaml_parse = mistral.utils.expression_utils:yaml_parse_
+    yaml_dump = mistral.utils.expression_utils:yaml_dump_
 
 mistral.expression.evaluators =
     yaql = mistral.expressions.yaql_expression:InlineYAQLEvaluator