diff --git a/test-cases/RMLFNOTC0010-CSV/mapping.ttl b/test-cases/RMLFNOTC0010-CSV/mapping.ttl
index b224685..17d75d7 100644
--- a/test-cases/RMLFNOTC0010-CSV/mapping.ttl
+++ b/test-cases/RMLFNOTC0010-CSV/mapping.ttl
@@ -26,7 +26,7 @@
         rml:objectMap [
             rml:functionExecution <#Execution> ;
             rml:returnMap [
-                rr:constant fns:domainOutput
+                rml:constant fns:domainOutput
             ]
         ]
     ] .