diff --git a/openpgp/keys_test.go b/openpgp/keys_test.go
index 186df735..357f7610 100644
--- a/openpgp/keys_test.go
+++ b/openpgp/keys_test.go
@@ -998,7 +998,7 @@ func assertNotationPackets(t *testing.T, keys EntityList) {
 		t.Fatalf("got %d Data Notation subpackets, expected %d", numSigs, numExpected)
 	}
 
-	if notations[0].HumanReadable != true {
+	if notations[0].IsHumanReadable != true {
 		t.Fatalf("got false, expected true")
 	}
 
diff --git a/openpgp/packet/notation.go b/openpgp/packet/notation.go
index 5c215c2e..f4bd97b2 100644
--- a/openpgp/packet/notation.go
+++ b/openpgp/packet/notation.go
@@ -5,8 +5,8 @@ package packet
 type Notation struct {
 	Name string
 	Value []byte
-	Critical bool
-	HumanReadable bool
+	IsCritical bool
+	IsHumanReadable bool
 }
 
 func (not *Notation) getData() []byte {
@@ -15,7 +15,7 @@ func (not *Notation) getData() []byte {
 	valueLen := len(not.Value)
 
 	data := make([]byte, 8 + nameLen + valueLen)
-	if not.HumanReadable {
+	if not.IsHumanReadable {
 		data[0] = 0x80
 	}
 
diff --git a/openpgp/packet/signature.go b/openpgp/packet/signature.go
index 23540111..8cd89026 100644
--- a/openpgp/packet/signature.go
+++ b/openpgp/packet/signature.go
@@ -380,10 +380,10 @@ func parseSignatureSubpacket(sig *Signature, subpacket []byte, isHashed bool) (r
 		}
 
 		notation := Notation{
-			HumanReadable: (subpacket[0] & 0x80) == 0x80,
+			IsHumanReadable: (subpacket[0] & 0x80) == 0x80,
 			Name: string(subpacket[8: (nameLength + 8)]),
 			Value: subpacket[(nameLength + 8) : (valueLength + nameLength + 8)],
-			Critical: isCritical,
+			IsCritical: isCritical,
 		}
 
 		sig.Notations = append(sig.Notations, notation)
@@ -964,7 +964,7 @@ func (sig *Signature) buildSubpackets(issuer PublicKey) (subpackets []outputSubp
 			outputSubpacket{
 				true,
 				notationDataSubpacket,
-				notation.Critical,
+				notation.IsCritical,
 				notation.getData(),
 			})
 	}