diff --git a/upup/pkg/fi/cloudup/awsup/machine_types.go b/upup/pkg/fi/cloudup/awsup/machine_types.go
index 0433a28955..c0727067d4 100644
--- a/upup/pkg/fi/cloudup/awsup/machine_types.go
+++ b/upup/pkg/fi/cloudup/awsup/machine_types.go
@@ -606,6 +606,13 @@ var MachineTypes []AWSMachineTypeInfo = []AWSMachineTypeInfo{
 	},
 
 	// x1 family
+	{
+		Name:           "x1.16xlarge",
+		MemoryGB:       976,
+		ECU:            174.5,
+		Cores:          64,
+		EphemeralDisks: []int{1920},
+	},
 	{
 		Name:           "x1.32xlarge",
 		MemoryGB:       1952,