diff --git a/buildmaster/dataset_names.yml b/buildmaster/dataset_names.yml
index ceb9cffb1a..beaa4a8d4d 100644
--- a/buildmaster/dataset_names.yml
+++ b/buildmaster/dataset_names.yml
@@ -1,3 +1,3 @@
 # <old name> : <new name>
 CMSWEASY840PB: CMS_WP_7TEV_ELECTRON_ASY
-CMSWMASY47FB: CMS_WP_7TEV_MUON
+CMSWMASY47FB: CMS_WP_7TEV_MUON_ASY