diff --git a/pkg/idtools/idtools.go b/pkg/idtools/idtools.go
index 68a072db22..9c591aff83 100644
--- a/pkg/idtools/idtools.go
+++ b/pkg/idtools/idtools.go
@@ -140,10 +140,10 @@ func NewIDMappings(username, groupname string) (*IDMappings, error) {
 		return nil, err
 	}
 	if len(subuidRanges) == 0 {
-		return nil, fmt.Errorf("No subuid ranges found for user %q", username)
+		return nil, fmt.Errorf("No subuid ranges found for user %q in %s", username, subuidFileName)
 	}
 	if len(subgidRanges) == 0 {
-		return nil, fmt.Errorf("No subgid ranges found for group %q", groupname)
+		return nil, fmt.Errorf("No subgid ranges found for group %q in %s", groupname, subgidFileName)
 	}
 
 	return &IDMappings{