diff --git a/is/rules.go b/is/rules.go
index 3cad215..c3cdc6b 100644
--- a/is/rules.go
+++ b/is/rules.go
@@ -197,7 +197,7 @@ var (
 	Base64 = validation.NewStringRuleWithError(govalidator.IsBase64, ErrBase64)
 	// DataURI validates if a string is a valid base64-encoded data URI
 	DataURI = validation.NewStringRuleWithError(govalidator.IsDataURI, ErrDataURI)
-	// E164 validates if a string is a valid ISO3166 Alpha 2 country code
+	// E164 validates if a string is a valid E164 phone number
 	E164 = validation.NewStringRuleWithError(isE164Number, ErrE164)
 	// CountryCode2 validates if a string is a valid ISO3166 Alpha 2 country code
 	CountryCode2 = validation.NewStringRuleWithError(govalidator.IsISO3166Alpha2, ErrCountryCode2)