diff --git a/src/machine/machine_atmega1280.go b/src/machine/machine_atmega1280.go
index 6c286f18b..7278173af 100644
--- a/src/machine/machine_atmega1280.go
+++ b/src/machine/machine_atmega1280.go
@@ -85,10 +85,10 @@ const (
 	PK1 = portK + 1
 	PK2 = portK + 2
 	PK3 = portK + 3
-	PK4 = portH + 4
-	PK5 = portH + 5
-	PK6 = portH + 6
-	PK7 = portH + 7
+	PK4 = portK + 4
+	PK5 = portK + 5
+	PK6 = portK + 6
+	PK7 = portK + 7
 	PL0 = portL + 0
 	PL1 = portL + 1
 	PL2 = portL + 2
diff --git a/src/machine/machine_atmega2560.go b/src/machine/machine_atmega2560.go
index 7a523ae11..c3a1ca1ab 100644
--- a/src/machine/machine_atmega2560.go
+++ b/src/machine/machine_atmega2560.go
@@ -87,10 +87,10 @@ const (
 	PK1 = portK + 1
 	PK2 = portK + 2
 	PK3 = portK + 3
-	PK4 = portH + 4
-	PK5 = portH + 5
-	PK6 = portH + 6
-	PK7 = portH + 7
+	PK4 = portK + 4
+	PK5 = portK + 5
+	PK6 = portK + 6
+	PK7 = portK + 7
 	PL0 = portL + 0
 	PL1 = portL + 1
 	PL2 = portL + 2