diff --git a/pkg/server/context.go b/pkg/server/context.go
index 4ba16e9..cfccc25 100644
--- a/pkg/server/context.go
+++ b/pkg/server/context.go
@@ -226,7 +226,7 @@ func (c *Context) Forwarded() (ret string) {
 
 // CheckXsrf validates the xsrf token
 func (c *Context) CheckXsrf() (ok bool) {
-	ok = checkXsrf(c.Form("token"), c.Token.RawSig()[:keySize])
+	ok = checkXsrf(c.Form("token"), c.Token.RawSig())
 	if !ok {
 		c.Error("wrong csrf token")
 	}