diff --git a/lib/helpers/read-partials.js b/lib/helpers/read-partials.js
index 9a6497a..644ca07 100644
--- a/lib/helpers/read-partials.js
+++ b/lib/helpers/read-partials.js
@@ -36,7 +36,7 @@ function readPartials(partialsRel, layoutsRel, metalsmith) {
     var partialAbs = path.join(partialsAbs, name);
     var partialPath = path.relative(layoutsAbs, partialAbs);
 
-    partials[name] = partialPath;
+    partials[name.replace(/\\/g, '/')] = partialPath;
   }
 
   return partials;
diff --git a/test/fixtures/partials-subdirectories/build/index.html b/test/fixtures/partials-subdirectories/build/index.html
new file mode 100644
index 0000000..3706802
--- /dev/null
+++ b/test/fixtures/partials-subdirectories/build/index.html
@@ -0,0 +1,3 @@
+<p>Nav</p>
+<p>Content</p>
+
diff --git a/test/fixtures/partials-subdirectories/expected/index.html b/test/fixtures/partials-subdirectories/expected/index.html
new file mode 100644
index 0000000..3706802
--- /dev/null
+++ b/test/fixtures/partials-subdirectories/expected/index.html
@@ -0,0 +1,3 @@
+<p>Nav</p>
+<p>Content</p>
+
diff --git a/test/fixtures/partials-subdirectories/layouts/layout.html b/test/fixtures/partials-subdirectories/layouts/layout.html
new file mode 100644
index 0000000..0d619fa
--- /dev/null
+++ b/test/fixtures/partials-subdirectories/layouts/layout.html
@@ -0,0 +1,2 @@
+{{>nested/nav}}
+{{{contents}}}
diff --git a/test/fixtures/partials-subdirectories/layouts/partials/nested/nav.html b/test/fixtures/partials-subdirectories/layouts/partials/nested/nav.html
new file mode 100644
index 0000000..8a1b726
--- /dev/null
+++ b/test/fixtures/partials-subdirectories/layouts/partials/nested/nav.html
@@ -0,0 +1 @@
+<p>Nav</p>
diff --git a/test/fixtures/partials-subdirectories/src/index.html b/test/fixtures/partials-subdirectories/src/index.html
new file mode 100644
index 0000000..f5e7012
--- /dev/null
+++ b/test/fixtures/partials-subdirectories/src/index.html
@@ -0,0 +1,4 @@
+---
+layout: layout.html
+---
+<p>Content</p>
diff --git a/test/index.js b/test/index.js
index 9a75ffc..3a61eb2 100644
--- a/test/index.js
+++ b/test/index.js
@@ -122,6 +122,24 @@ describe('metalsmith-layouts', function(){
     });
   });
 
+  it('should find partials in subdirectories correctly', function(done){
+    // This test would only fail on Windows if readPartials did not
+    // replace backslashes in partial names
+    var instance = Metalsmith('test/fixtures/partials-subdirectories')
+      .use(layouts({
+        engine: 'handlebars',
+        partials: 'layouts/partials'
+      }));
+
+    instance.build(function(err){
+      if (err) {
+        return done(err);
+      }
+      equal('test/fixtures/partials-subdirectories/expected', 'test/fixtures/partials-subdirectories/build');
+      done();
+    });
+  });
+
   it('should accept a partials option', function(done){
     Metalsmith('test/fixtures/partials-option')
       .use(layouts({