diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/IRelationshipService.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/IRelationshipService.java
index 83b99291d7c3746e9003d6b2498303bb88fb0852..cc028262fc7a2db6cc133e9687363b653a20358b 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/IRelationshipService.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/business/IRelationshipService.java
@@ -152,7 +152,7 @@ public interface IRelationshipService
 
     @Transactional(propagation = Propagation.MANDATORY)
     @RolesAllowed(value =
-    { RoleWithHierarchy.SPACE_ETL_SERVER, RoleWithHierarchy.SPACE_POWER_USER })
+    { RoleWithHierarchy.SPACE_ETL_SERVER, RoleWithHierarchy.SPACE_USER })
     @Capability("ADD_PARENT_TO_SAMPLE")
     public void addParentToSample(IAuthSession session,
             @AuthorizationGuard(name = "SAMPLE", guardClass = SamplePEPredicate.class)