diff --git a/package/moq/moq.go b/package/moq/moq.go
index b647076..34ac95b 100644
--- a/package/moq/moq.go
+++ b/package/moq/moq.go
@@ -21,6 +21,8 @@ type Mocker struct {
 	fset    *token.FileSet
 	pkgs    map[string]*ast.Package
 	pkgName string
+
+	imports []string
 }
 
 // New makes a new Mocker for the specified package directory.
@@ -63,7 +65,10 @@ func (m *Mocker) Mock(w io.Writer, name ...string) error {
 	if len(name) == 0 {
 		return errors.New("must specify one interface")
 	}
-	var objs []*obj
+	doc := doc{
+		PackageName: m.pkgName,
+		Imports:     moqImports,
+	}
 	for _, pkg := range m.pkgs {
 		i := 0
 		files := make([]*ast.File, len(pkg.Files))
@@ -85,7 +90,7 @@ func (m *Mocker) Mock(w io.Writer, name ...string) error {
 				return fmt.Errorf("%s (%s) not an interface", n, iface.Type().String())
 			}
 			iiface := iface.Type().Underlying().(*types.Interface).Complete()
-			obj := &obj{
+			obj := obj{
 				InterfaceName: n,
 			}
 			for i := 0; i < iiface.NumMethods(); i++ {
@@ -98,16 +103,11 @@ func (m *Mocker) Mock(w io.Writer, name ...string) error {
 				method.Params = m.extractArgs(sig, sig.Params(), "in%d")
 				method.Returns = m.extractArgs(sig, sig.Results(), "out%d")
 			}
-			objs = append(objs, obj)
+			doc.Objects = append(doc.Objects, obj)
 		}
 	}
-	err := m.tmpl.Execute(w, struct {
-		PackageName string
-		Objs        []*obj
-	}{
-		PackageName: m.pkgName,
-		Objs:        objs,
-	})
+	doc.Imports = append(doc.Imports, m.imports...)
+	err := m.tmpl.Execute(w, doc)
 	if err != nil {
 		return err
 	}
@@ -118,6 +118,7 @@ func (m *Mocker) packageQualifier(pkg *types.Package) string {
 	if m.pkgName == pkg.Name() {
 		return ""
 	}
+	m.imports = append(m.imports, pkg.Path())
 	return pkg.Name()
 }
 
@@ -143,6 +144,12 @@ func (m *Mocker) extractArgs(sig *types.Signature, list *types.Tuple, nameFormat
 	return params
 }
 
+type doc struct {
+	PackageName string
+	Objects     []obj
+	Imports     []string
+}
+
 type obj struct {
 	InterfaceName string
 	Methods       []*method
@@ -204,11 +211,21 @@ func (p param) TypeString() string {
 	return p.Type
 }
 
+// moqImports are the imports all moq files get.
+var moqImports = []string{"sync"}
+
+// moqTemplate is the template for mocked code.
 var moqTemplate = `package {{.PackageName}}
 
 // AUTOGENERATED BY MOQ
 // github.com/matryer/moq
-{{ range $i, $obj := .Objs }}
+
+import (
+{{- range .Imports }}
+	"{{.}}"
+{{- end }}
+}
+{{ range $i, $obj := .Objects }}
 // {{.InterfaceName}}Mock is a mock implementation of {{.InterfaceName}}.
 //
 //     func TestSomethingThatUses{{.InterfaceName}}(t *testing.T) {
@@ -232,9 +249,10 @@ type {{.InterfaceName}}Mock struct {
 	// CallsTo gets counters for each of the methods indicating
 	// how many times each one was called.
 	CallsTo struct {
+		lock sync.Mutex
 {{- range .Methods }}
 		// {{ .Name }} holds the number of calls to the {{.Name}} method.
-		{{ .Name }} uint64
+		{{ .Name }} int
 {{- end }}
 	}
 }
@@ -244,7 +262,9 @@ func (mock *{{$obj.InterfaceName}}Mock) {{.Name}}({{.Arglist}}) {{.ReturnArglist
 	if mock.{{.Name}}Func == nil {
 		panic("moq: {{$obj.InterfaceName}}Mock.{{.Name}}Func is nil but was just called")
 	}
-	atomic.AddUint64(&mock.CallsTo.{{.Name}}, 1) // count this
+	mock.CallsTo.lock.Lock()
+	mock.CallsTo.{{.Name}}++
+	mock.CallsTo.lock.Unlock()
 {{- if .ReturnArglist }}
 	return mock.{{.Name}}Func({{.ArgCallList}})
 {{- else }}
diff --git a/package/moq/moq_test.go b/package/moq/moq_test.go
index 36ff5b2..2c86670 100644
--- a/package/moq/moq_test.go
+++ b/package/moq/moq_test.go
@@ -2,6 +2,7 @@ package moq
 
 import (
 	"bytes"
+	"log"
 	"strings"
 	"testing"
 )
@@ -36,6 +37,7 @@ func TestMoq(t *testing.T) {
 			t.Errorf("expected but missing: \"%s\"", str)
 		}
 	}
+	log.Println(s)
 }
 
 func TestMoqExplicitPackage(t *testing.T) {
@@ -138,3 +140,25 @@ func TestChannelNames(t *testing.T) {
 		}
 	}
 }
+
+func TestImports(t *testing.T) {
+	m, err := New("testdata/imports/two", "")
+	if err != nil {
+		t.Errorf("moq.New: %s", err)
+	}
+	var buf bytes.Buffer
+	err = m.Mock(&buf, "DoSomething")
+	if err != nil {
+		t.Errorf("m.Mock: %s", err)
+	}
+	s := buf.String()
+	var strs = []string{
+		`	"sync"`,
+		`	"github.com/matryer/moq/package/moq/testdata/imports/one"`,
+	}
+	for _, str := range strs {
+		if !strings.Contains(s, str) {
+			t.Errorf("expected by missing: \"%s\"", str)
+		}
+	}
+}
diff --git a/package/moq/testdata/imports/one/one.go b/package/moq/testdata/imports/one/one.go
new file mode 100644
index 0000000..c38a014
--- /dev/null
+++ b/package/moq/testdata/imports/one/one.go
@@ -0,0 +1,4 @@
+package one
+
+// Thing is just a thing.
+type Thing struct{}
diff --git a/package/moq/testdata/imports/two/two.go b/package/moq/testdata/imports/two/two.go
new file mode 100644
index 0000000..66d5ca2
--- /dev/null
+++ b/package/moq/testdata/imports/two/two.go
@@ -0,0 +1,10 @@
+package two
+
+import (
+	"github.com/matryer/moq/package/moq/testdata/imports/one"
+)
+
+// DoSomething does something.
+type DoSomething interface {
+	Do(thing one.Thing) error
+}