diff --git a/tests/run.js b/tests/run.js
index 6449ea6..f721d02 100644
--- a/tests/run.js
+++ b/tests/run.js
@@ -12,3 +12,4 @@ require('./test_07_02.js');
 require('./test_08.js');
 require('./test_09_01.js');
 require('./test_09_02.js');
+require('./test_12.js');
diff --git a/tests/samples/issue10_include.js b/tests/samples/issue10_include.js
new file mode 100644
index 0000000..eebf6db
--- /dev/null
+++ b/tests/samples/issue10_include.js
@@ -0,0 +1,4 @@
+// #ifndef TEST
+// #define var TEST=true
+console.log('test');
+// #endif
diff --git a/tests/samples/issue10_main.js b/tests/samples/issue10_main.js
new file mode 100644
index 0000000..f55e549
--- /dev/null
+++ b/tests/samples/issue10_main.js
@@ -0,0 +1,3 @@
+// #include "issue10_include.js"
+console.log('testing include');
+// #include "issue10_include.js"
diff --git a/tests/test_12.js b/tests/test_12.js
new file mode 100644
index 0000000..7d7b75b
--- /dev/null
+++ b/tests/test_12.js
@@ -0,0 +1,14 @@
+/* eslint no-console: 0 */
+
+var test = require('tape');
+
+var Preprocessor = require(__dirname + '/../Preprocessor.js');
+var fs = require('fs');
+
+test('test_12:issue10', function(t) {
+  var pp = new Preprocessor(fs.readFileSync(__dirname + '/samples/issue10_main.js'), __dirname + '/samples');
+  var src = pp.process({}, console.log).replace(/\r/g, '');
+  t.equal(src, "console.log('test');\nconsole.log('testing include');\n");
+
+  t.end();
+});