diff --git a/Makefile b/Makefile
index b98f8b1..1867f28 100644
--- a/Makefile
+++ b/Makefile
@@ -21,9 +21,11 @@ generate: root build
 		.root/src/$(PKG)/tests/snake.go \
 		.root/src/$(PKG)/tests/data.go \
 		.root/src/$(PKG)/tests/omitempty.go \
+		.root/src/$(PKG)/tests/nothing.go \
 		.root/src/$(PKG)/tests/camel_case_functions.go
 
 	.root/bin/easyjson -all .root/src/$(PKG)/tests/data.go 
+	.root/bin/easyjson -all .root/src/$(PKG)/tests/nothing.go
 	.root/bin/easyjson -snake_case .root/src/$(PKG)/tests/snake.go
 	.root/bin/easyjson -omit_empty .root/src/$(PKG)/tests/omitempty.go
 	.root/bin/easyjson -camel_case_functions .root/src/$(PKG)/tests/camel_case_functions.go
diff --git a/bootstrap/bootstrap.go b/bootstrap/bootstrap.go
index 8bca39a..39b706f 100644
--- a/bootstrap/bootstrap.go
+++ b/bootstrap/bootstrap.go
@@ -51,20 +51,23 @@ func (g *Generator) writeStub() error {
 	fmt.Fprintln(f, "// compilable during generation.")
 	fmt.Fprintln(f)
 	fmt.Fprintln(f, "package ", g.PkgName)
-	fmt.Fprintln(f)
-	fmt.Fprintln(f, "import (")
-	fmt.Fprintln(f, `  "`+pkgWriter+`"`)
-	fmt.Fprintln(f, `  "`+pkgLexer+`"`)
-	fmt.Fprintln(f, ")")
+
+	if len(g.Types) > 0 {
+		fmt.Fprintln(f)
+		fmt.Fprintln(f, "import (")
+		fmt.Fprintln(f, `  "`+pkgWriter+`"`)
+		fmt.Fprintln(f, `  "`+pkgLexer+`"`)
+		fmt.Fprintln(f, ")")
+	}
 
 	for _, t := range g.Types {
 		fmt.Fprintln(f)
 		if !g.NoStdMarshalers {
-			fmt.Fprintln(f, "func (*", t, ") MarshalJSON() ([]byte, error) { return nil, nil }")
+			fmt.Fprintln(f, "func (", t, ") MarshalJSON() ([]byte, error) { return nil, nil }")
 			fmt.Fprintln(f, "func (*", t, ") UnmarshalJSON([]byte) error { return nil }")
 		}
 
-		fmt.Fprintln(f, "func (*", t, ") MarshalEasyJSON(w *jwriter.Writer) {}")
+		fmt.Fprintln(f, "func (", t, ") MarshalEasyJSON(w *jwriter.Writer) {}")
 		fmt.Fprintln(f, "func (*", t, ") UnmarshalEasyJSON(l *jlexer.Lexer) {}")
 		fmt.Fprintln(f)
 		fmt.Fprintln(f, "type EasyJSON_exporter_"+t+" *"+t)
@@ -91,8 +94,10 @@ func (g *Generator) writeMain() (path string, err error) {
 	fmt.Fprintln(f, `  "os"`)
 	fmt.Fprintln(f)
 	fmt.Fprintf(f, "  %q\n", genPackage)
-	fmt.Fprintln(f)
-	fmt.Fprintf(f, "  pkg %q\n", g.PkgPath)
+	if len(g.Types) > 0 {
+		fmt.Fprintln(f)
+		fmt.Fprintf(f, "  pkg %q\n", g.PkgPath)
+	}
 	fmt.Fprintln(f, ")")
 	fmt.Fprintln(f)
 	fmt.Fprintln(f, "func main() {")
diff --git a/gen/generator.go b/gen/generator.go
index 227d5e7..fe8af99 100644
--- a/gen/generator.go
+++ b/gen/generator.go
@@ -174,7 +174,12 @@ func (g *Generator) printHeader() {
 
 	fmt.Println(")")
 	fmt.Println("")
-	fmt.Println("var _ = json.RawMessage{} // suppress unused package warning")
+	fmt.Println("// suppress unused package warning")
+	fmt.Println("var (")
+	fmt.Println("   _ = json.RawMessage{}")
+	fmt.Println("   _ = jlexer.Lexer{}")
+	fmt.Println("   _ = jwriter.Writer{}")
+	fmt.Println(")")
 
 	fmt.Println()
 }
diff --git a/tests/data.go b/tests/data.go
index d0e1e7a..1c4ae78 100644
--- a/tests/data.go
+++ b/tests/data.go
@@ -437,8 +437,9 @@ var mapsString = `{` +
 	`}`
 
 type DeepNest struct {
-	SliceMap map[Str][]Str
-	MapSlice []map[Str]Str
+	SliceMap  map[Str][]Str
+	SliceMap1 map[Str][]Str
+	MapSlice  []map[Str]Str
 }
 
 var deepNestValue = DeepNest{
@@ -447,6 +448,8 @@ var deepNestValue = DeepNest{
 			"0",
 			"1",
 		},
+	},
+	SliceMap1: map[Str][]Str{
 		"testSliceMap2": nil,
 	},
 	MapSlice: []map[Str]Str{
@@ -458,7 +461,9 @@ var deepNestValue = DeepNest{
 
 var deepNestString = `{` +
 	`"SliceMap":{` +
-	`"testSliceMap1":["0","1"],` +
+	`"testSliceMap1":["0","1"]` +
+	`},` +
+	`"SliceMap1":{` +
 	`"testSliceMap2":[]` +
 	`},` +
 	`"MapSlice":[` +
diff --git a/tests/nothing.go b/tests/nothing.go
new file mode 100644
index 0000000..35334f5
--- /dev/null
+++ b/tests/nothing.go
@@ -0,0 +1,3 @@
+package tests
+
+// No structs in this file