diff --git a/webapi/src/main/scala/org/knora/webapi/responders/v2/ResourcesResponderV2.scala b/webapi/src/main/scala/org/knora/webapi/responders/v2/ResourcesResponderV2.scala
index 2299c759bb..d1126d14da 100644
--- a/webapi/src/main/scala/org/knora/webapi/responders/v2/ResourcesResponderV2.scala
+++ b/webapi/src/main/scala/org/knora/webapi/responders/v2/ResourcesResponderV2.scala
@@ -1298,7 +1298,7 @@ class ResourcesResponderV2(responderData: ResponderData) extends ResponderWithSt
             resource: ReadResourceV2 = resources.toResource(gravsearchTemplateIri)
 
             _ = if (resource.resourceClassIri.toString != OntologyConstants.KnoraBase.TextRepresentation) {
-                throw BadRequestException(s"Resource $gravsearchTemplateIri is not a text file")
+                throw BadRequestException(s"Resource $gravsearchTemplateIri is not a Gravsearch template (text file expected)")
             }
 
             gravsearchFileValueContent: TextFileValueContentV2 = resource.values.get(OntologyConstants.KnoraBase.HasTextFileValue.toSmartIri) match {