1 files changed, 1 insertions, 1 deletions
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/ml/FeatureArguments.java b/config-model/src/main/java/com/yahoo/vespa/model/ml/FeatureArguments.java
index 372b355b2d3..b52fd060a1c 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/ml/FeatureArguments.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/ml/FeatureArguments.java
@@ -57,7 +57,7 @@ public class FeatureArguments {
     private static String asString(ExpressionNode node) {
         if ( ! (node instanceof ConstantNode))
             throw new IllegalArgumentException("Expected a constant string as argument, but got '" + node);
-        return stripQuotes(((ConstantNode)node).sourceString());
+        return stripQuotes(node.toString());
     }
 
     private static String stripQuotes(String s) {