diff --git a/hmac.go b/hmac.go
index a8450d3..e76e45d 100644
--- a/hmac.go
+++ b/hmac.go
@@ -7,11 +7,13 @@ import (
 	"errors"
 )
 
+// Implements the HMAC-SHA family of signing methods signing methods
 type SigningMethodHMAC struct {
 	Name string
 	Hash crypto.Hash
 }
 
+// Specific instances for HS256 and company
 var (
 	SigningMethodHS256 *SigningMethodHMAC
 	SigningMethodHS384 *SigningMethodHMAC
diff --git a/rsa.go b/rsa.go
index 495e5c9..cddffce 100644
--- a/rsa.go
+++ b/rsa.go
@@ -6,11 +6,13 @@ import (
 	"crypto/rsa"
 )
 
+// Implements the RSA family of signing methods signing methods
 type SigningMethodRSA struct {
 	Name string
 	Hash crypto.Hash
 }
 
+// Specific instances for RS256 and company
 var (
 	SigningMethodRS256 *SigningMethodRSA
 	SigningMethodRS384 *SigningMethodRSA