diff --git a/cmd/plugin_antispam_ocr/main.go b/cmd/plugin_antispam_ocr/main.go
index 5b0735645c70c9c401a175b0d439430b0149b22d..0cf08995fd538e84fe261917ff31560c90a223ae 100644
--- a/cmd/plugin_antispam_ocr/main.go
+++ b/cmd/plugin_antispam_ocr/main.go
@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"image"
+	"io"
 	"math"
 	"net/http"
 	"os"