diff --git a/core/commands/external.go b/core/commands/external.go
index c7edc4744..20b384a96 100644
--- a/core/commands/external.go
+++ b/core/commands/external.go
@@ -33,7 +33,7 @@ func ExternalBinary() *cmds.Command {
 					}
 				}
 
-				res.SetError(fmt.Errorf("%s not installed."), cmds.ErrNormal)
+				res.SetError(fmt.Errorf("%s not installed.", binname), cmds.ErrNormal)
 				return
 			}