diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
index d3b08b1f..676f7134 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
@@ -40,6 +40,8 @@ public interface Value {
 
     override fun hashCode(): Int
 
+    override fun toString(): String
+
     public companion object {
         public const val TYPE: String = "value"