diff --git a/generator.go b/generator.go
index de8bd7c..58b3084 100644
--- a/generator.go
+++ b/generator.go
@@ -135,11 +135,12 @@ func (o *generatorS) validator(input interface{}) Validator {
 			if bindingTags := elementT.Tag.Get("binding"); bindingTags != "" {
 				splits := strings.Split(bindingTags, ",")
 				for j := 0; j < len(splits); j++ {
-					value := elementT.Tag.Get("_" + splits[j])
+					rule := strings.Split(splits[j], "=")
+					value := elementT.Tag.Get("_" + rule[0])
 					if value == "" {
-						value = elementT.Tag.Get(splits[j])
+						value = elementT.Tag.Get(rule[0])
 					}
-					addSpecificMessage(r, splits[j], value)
+					addSpecificMessage(r, rule[0], value)
 				}
 			}
 			rules[elementT.Name] = r