diff --git a/BUILD.gn b/BUILD.gn
index 5b06c17..5956f67 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1213,6 +1213,23 @@
     }
   }
 
+  test_app("bookmaker") {
+    sources = [
+      "tools/bookmaker/bookmaker.cpp",
+      "tools/bookmaker/fiddleParser.cpp",
+      "tools/bookmaker/includeParser.cpp",
+      "tools/bookmaker/includeWriter.cpp",
+      "tools/bookmaker/mdOut.cpp",
+      "tools/bookmaker/parserCommon.cpp",
+      "tools/bookmaker/spellCheck.cpp",
+    ]
+    deps = [
+      ":flags",
+      ":skia",
+      ":tool_utils",
+    ]
+  }
+
   import("gn/samples.gni")
   test_lib("samples") {
     public_include_dirs = [ "samplecode" ]