diff --git a/index.js b/index.js
index 91a863e..3a14a53 100644
--- a/index.js
+++ b/index.js
@@ -3,8 +3,12 @@
 var path = require('path');
 var isglob = require('is-glob');
 var pathDirname = require('path-dirname');
+var isWin32 = require('os').platform() === 'win32';
 
 module.exports = function globParent(str) {
+	// flip windows path separators
+	if (isWin32 && str.indexOf('/') < 0) str = str.split('\\').join('/');
+
 	// special case for strings ending in enclosure containing path separator
 	if (/[\{\[].*[\/]*.*[\}\]]$/.test(str)) str += '/';
 
diff --git a/test.js b/test.js
index 92f194a..2b9f212 100644
--- a/test.js
+++ b/test.js
@@ -162,3 +162,11 @@ describe('glob2base test patterns', function() {
     assert.equal(gp('ooga/{booga,sooga}/**/dooga/{eooga,fooga}'), 'ooga');
   });
 });
+
+if (require('os').platform() === 'win32') {
+  describe('technically invalid windows globs', function() {
+    it('should manage simple globs with backslash path separator', function() {
+      assert.equal(gp('C:\\path\\*.js'), 'C:/path')
+    });
+  });
+}