diff --git a/service/rds/customizations.go b/service/rds/customizations.go
index d3023d1f764..d412fb282ba 100644
--- a/service/rds/customizations.go
+++ b/service/rds/customizations.go
@@ -29,6 +29,8 @@ func fillPresignedURL(r *request.Request) {
 	fns := map[string]func(r *request.Request){
 		opCopyDBSnapshot:              copyDBSnapshotPresign,
 		opCreateDBInstanceReadReplica: createDBInstanceReadReplicaPresign,
+		opCopyDBClusterSnapshot:       copyDBClusterSnapshotPresign,
+		opCreateDBCluster:             createDBClusterPresign,
 	}
 	if !r.ParamsFilled() {
 		return
@@ -41,7 +43,7 @@ func fillPresignedURL(r *request.Request) {
 func copyDBSnapshotPresign(r *request.Request) {
 	originParams := r.Params.(*CopyDBSnapshotInput)
 
-	if originParams.PreSignedUrl != nil || originParams.DestinationRegion != nil {
+	if originParams.SourceRegion == nil || originParams.PreSignedUrl != nil || originParams.DestinationRegion != nil {
 		return
 	}
 
@@ -53,7 +55,7 @@ func copyDBSnapshotPresign(r *request.Request) {
 func createDBInstanceReadReplicaPresign(r *request.Request) {
 	originParams := r.Params.(*CreateDBInstanceReadReplicaInput)
 
-	if originParams.PreSignedUrl != nil || originParams.DestinationRegion != nil {
+	if originParams.SourceRegion == nil || originParams.PreSignedUrl != nil || originParams.DestinationRegion != nil {
 		return
 	}
 
@@ -62,6 +64,30 @@ func createDBInstanceReadReplicaPresign(r *request.Request) {
 	originParams.PreSignedUrl = presignURL(r, originParams.SourceRegion, newParams)
 }
 
+func copyDBClusterSnapshotPresign(r *request.Request) {
+	originParams := r.Params.(*CopyDBClusterSnapshotInput)
+
+	if originParams.SourceRegion == nil || originParams.PreSignedUrl != nil || originParams.DestinationRegion != nil {
+		return
+	}
+
+	originParams.DestinationRegion = r.Config.Region
+	newParams := awsutil.CopyOf(r.Params).(*CopyDBClusterSnapshotInput)
+	originParams.PreSignedUrl = presignURL(r, originParams.SourceRegion, newParams)
+}
+
+func createDBClusterPresign(r *request.Request) {
+	originParams := r.Params.(*CreateDBClusterInput)
+
+	if originParams.SourceRegion == nil || originParams.PreSignedUrl != nil || originParams.DestinationRegion != nil {
+		return
+	}
+
+	originParams.DestinationRegion = r.Config.Region
+	newParams := awsutil.CopyOf(r.Params).(*CreateDBClusterInput)
+	originParams.PreSignedUrl = presignURL(r, originParams.SourceRegion, newParams)
+}
+
 // presignURL will presign the request by using SoureRegion to sign with. SourceRegion is not
 // sent to the service, and is only used to not have the SDKs parsing ARNs.
 func presignURL(r *request.Request, sourceRegion *string, newParams interface{}) *string {
diff --git a/service/rds/customizations_test.go b/service/rds/customizations_test.go
index df12d9bdc38..62db13af74c 100644
--- a/service/rds/customizations_test.go
+++ b/service/rds/customizations_test.go
@@ -5,6 +5,7 @@ import (
 	"io/ioutil"
 	"net/url"
 	"testing"
+	"time"
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/request"
@@ -79,3 +80,26 @@ func TestPresignWithPresignSet(t *testing.T) {
 		assert.Regexp(t, `presignedURL`, u)
 	}
 }
+
+func TestPresignWithSourceNotSet(t *testing.T) {
+	reqs := map[string]*request.Request{}
+	svc := New(unit.Session, &aws.Config{Region: aws.String("us-west-2")})
+
+	assert.NotPanics(t, func() {
+		// Doesn't panic on nil input
+		req, _ := svc.CopyDBSnapshotRequest(nil)
+		req.Sign()
+	})
+
+	reqs[opCopyDBSnapshot], _ = svc.CopyDBSnapshotRequest(&CopyDBSnapshotInput{
+		SourceDBSnapshotIdentifier: aws.String("foo"),
+		TargetDBSnapshotIdentifier: aws.String("bar"),
+	})
+
+	for _, req := range reqs {
+		_, err := req.Presign(5 * time.Minute)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+}