diff --git a/main.go b/main.go
index cdcaddd..afb4b02 100644
--- a/main.go
+++ b/main.go
@@ -5,7 +5,6 @@ import (
 	"crypto/x509"
 	"encoding/json"
 	"encoding/pem"
-	"errors"
 	"flag"
 	"fmt"
 	"os"
@@ -85,7 +84,7 @@ func GetGroupsOfUser(username string, baseDN string, conn *ldap.Conn) ([]string,
 	}
 
 	if len(sr.Entries) != 1 {
-		return nil, errors.New("user does not exist")
+		return nil, fmt.Errorf("user '%s' does not exist", samAccountName)
 	}
 
 	userdn := sr.Entries[0].DN