diff --git a/main.go b/main.go
index 18bb5a4..54f8459 100644
--- a/main.go
+++ b/main.go
@@ -317,7 +317,8 @@ func licenseHeader(path string, tmpl *template.Template, data licenseData) ([]by
 		".proto",
 		".rs",
 		".swift",
-		".v", ".sv":
+		".v", ".sv",
+		".zig":
 		lic, err = executeTemplate(tmpl, data, "", "// ", "")
 	case
 		".awk",
diff --git a/main_test.go b/main_test.go
index 5adb4ed..ecb115d 100644
--- a/main_test.go
+++ b/main_test.go
@@ -340,6 +340,7 @@ func TestLicenseHeader(t *testing.T) {
 				"f.rs",
 				"f.swift",
 				"f.v", "f.sv",
+				"f.zig",
 			},
 			"// HYS\n\n",
 		},
diff --git a/testdata/expected/file.zig b/testdata/expected/file.zig
new file mode 100644
index 0000000..88ef9f8
--- /dev/null
+++ b/testdata/expected/file.zig
@@ -0,0 +1,19 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+const std = @import("std");
+
+pub fn main() void {
+    std.debug.print("Hello world!\n", .{});
+}
diff --git a/testdata/initial/file.zig b/testdata/initial/file.zig
new file mode 100644
index 0000000..d463fca
--- /dev/null
+++ b/testdata/initial/file.zig
@@ -0,0 +1,5 @@
+const std = @import("std");
+
+pub fn main() void {
+    std.debug.print("Hello world!\n", .{});
+}