diff --git a/tfk8s.go b/tfk8s.go
index d1f675b..525e833 100644
--- a/tfk8s.go
+++ b/tfk8s.go
@@ -89,13 +89,23 @@ func stripServerSideFields(m map[string]interface{}) {
 	}
 }
 
-func toHCL(doc map[interface{}]interface{}, providerAlias string, stripServerSide bool, mapOnly bool) (string, error) {
+func toHCL(doc map[interface{}]interface{}, providerAlias string, stripServerSide bool, mapOnly bool, defaultNamespace bool) (string, error) {
 	formattable := fixMap(doc)
 
 	if stripServerSide {
 		stripServerSideFields(formattable)
 	}
 
+	if defaultNamespace {
+		// Add "namespace" = "default" to metadata if no namespace specified
+		metadata, ok := formattable["metadata"].(map[string]interface{})
+		if !ok {
+			return "", fmt.Errorf("manifest is missing metadata")
+		}
+		if _, ok := metadata["namespace"]; !ok {
+			metadata["namespace"] = "default"
+		}
+	}
 	// TODO need to find a way of ordering the fields in the output
 	s, err := repl.FormatResult(formattable)
 	if err != nil {
@@ -131,7 +141,7 @@ func toHCL(doc map[interface{}]interface{}, providerAlias string, stripServerSid
 
 // ToHCL converts a file containing one or more Kubernetes configs
 // and converts it to resources that can be used by the Terraform Kubernetes Provider
-func ToHCL(r io.Reader, providerAlias string, stripServerSide bool, mapOnly bool) (string, error) {
+func ToHCL(r io.Reader, providerAlias string, stripServerSide bool, mapOnly bool, defaultNamespace bool) (string, error) {
 	hcl := ""
 
 	decoder := yaml.NewDecoder(r)
@@ -150,7 +160,7 @@ func ToHCL(r io.Reader, providerAlias string, stripServerSide bool, mapOnly bool
 			}
 		}
 
-		formatted, err := toHCL(doc, providerAlias, stripServerSide, mapOnly)
+		formatted, err := toHCL(doc, providerAlias, stripServerSide, mapOnly, defaultNamespace)
 
 		if err != nil {
 			return "", fmt.Errorf("error converting YAML to HCL: %s", err)
@@ -170,6 +180,7 @@ func main() {
 	infile := flag.StringP("file", "f", "-", "Input file containing Kubernetes YAML manifests")
 	outfile := flag.StringP("output", "o", "-", "Output file to write Terraform config")
 	providerAlias := flag.StringP("provider", "p", "", "Provider alias to populate the `provider` attribute")
+	defaultNamespace := flag.BoolP("namespace", "n", false, "Fill in default namespace when none is set")
 	stripServerSide := flag.BoolP("strip", "s", false, "Strip out server side fields - use if you are piping from kubectl get")
 	version := flag.BoolP("version", "V", false, "Show tool version")
 	mapOnly := flag.BoolP("map-only", "M", false, "Output only an HCL map structure")
@@ -192,7 +203,7 @@ func main() {
 		}
 	}
 
-	hcl, err := ToHCL(file, *providerAlias, *stripServerSide, *mapOnly)
+	hcl, err := ToHCL(file, *providerAlias, *stripServerSide, *mapOnly, *defaultNamespace)
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
diff --git a/tfk8s_test.go b/tfk8s_test.go
index 23c595e..4cdcb96 100644
--- a/tfk8s_test.go
+++ b/tfk8s_test.go
@@ -17,7 +17,7 @@ data:
   TEST: test`
 
 	r := strings.NewReader(yaml)
-	output, err := ToHCL(r, "", false, false)
+	output, err := ToHCL(r, "", false, false, false)
 
 	if err != nil {
 		t.Fatal("Converting to HCL failed:", err)
@@ -57,7 +57,7 @@ data:
   TEST: two`
 
 	r := strings.NewReader(yaml)
-	output, err := ToHCL(r, "", false, false)
+	output, err := ToHCL(r, "", false, false, false)
 
 	if err != nil {
 		t.Fatal("Converting to HCL failed:", err)
@@ -103,7 +103,7 @@ data:
   TEST: test`
 
 	r := strings.NewReader(yaml)
-	output, err := ToHCL(r, "kubernetes-alpha", false, false)
+	output, err := ToHCL(r, "kubernetes-alpha", false, false, false)
 
 	if err != nil {
 		t.Fatal("Converting to HCL failed:", err)
@@ -148,7 +148,7 @@ metadata:
   - test`
 
 	r := strings.NewReader(yaml)
-	output, err := ToHCL(r, "", true, false)
+	output, err := ToHCL(r, "", true, false, false)
 
 	if err != nil {
 		t.Fatal("Converting to HCL failed:", err)
@@ -185,7 +185,7 @@ metadata:
   uid: bea6500b-0637-4d2d-b726-e0bda0b595dd`
 
 	r := strings.NewReader(yaml)
-	output, err := ToHCL(r, "", true, true)
+	output, err := ToHCL(r, "", true, true, false)
 
 	if err != nil {
 		t.Fatal("Converting to HCL failed:", err)
@@ -204,3 +204,72 @@ metadata:
 
 	assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(output))
 }
+
+func TestToHCLDefaultNamespace(t *testing.T) {
+	yaml := `---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: test
+data:
+  TEST: test`
+
+	r := strings.NewReader(yaml)
+	output, err := ToHCL(r, "", false, false, true)
+
+	if err != nil {
+		t.Fatal("Converting to HCL failed:", err)
+	}
+
+	expected := `
+resource "kubernetes_manifest" "configmap_test" {
+  manifest = {
+    "apiVersion" = "v1"
+    "data" = {
+      "TEST" = "test"
+    }
+    "kind" = "ConfigMap"
+    "metadata" = {
+      "name" = "test"
+      "namespace" = "default"
+    }
+  }
+}`
+
+	assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(output))
+}
+
+func TestToHCLOthertNamespace(t *testing.T) {
+	yaml := `---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: test
+  namespace: foobar
+data:
+  TEST: test`
+
+	r := strings.NewReader(yaml)
+	output, err := ToHCL(r, "", false, false, true)
+
+	if err != nil {
+		t.Fatal("Converting to HCL failed:", err)
+	}
+
+	expected := `
+resource "kubernetes_manifest" "configmap_test" {
+  manifest = {
+    "apiVersion" = "v1"
+    "data" = {
+      "TEST" = "test"
+    }
+    "kind" = "ConfigMap"
+    "metadata" = {
+      "name" = "test"
+      "namespace" = "foobar"
+    }
+  }
+}`
+
+	assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(output))
+}