diff --git a/xmpp.go b/xmpp.go
index 222d483..169bb0a 100644
--- a/xmpp.go
+++ b/xmpp.go
@@ -262,6 +262,9 @@ type Options struct {
 	// MUST be a valid UUIDv4
 	UserAgentID string
 
+	// Enable XEP-0484: Fast Authentication Streamlining Tokens
+	Fast bool
+
 	// XEP-0484: Fast Authentication Streamlining Tokens
 	// Fast Token
 	FastToken string
@@ -625,7 +628,7 @@ func (c *Client) init(o *Options) error {
 				if o.UserAgentID != "" {
 					userAgentID = fmt.Sprintf(" id='%s'", o.UserAgentID)
 				}
-				if f.Authentication.Inline.Fast.Mechanism != nil && o.UserAgentID != "" && c.IsEncrypted() {
+				if o.Fast && f.Authentication.Inline.Fast.Mechanism != nil && o.UserAgentID != "" && c.IsEncrypted() {
 					var mech string
 					if o.FastToken == "" {
 						m := f.Authentication.Inline.Fast.Mechanism