diff --git a/distutils_rust/__init__.py b/distutils_rust/__init__.py
--- a/distutils_rust/__init__.py
+++ b/distutils_rust/__init__.py
@@ -75,6 +75,11 @@
     def get_temp_output(self, ext):
         """Returns the location in the temp directory of the output file."""
         platform = distutils.util.get_platform()
+        if platform.startswith('win-'):
+            libsuffix = '.dll'
+            return os.path.join('debug' if self.debug else 'release',
+                                ext.name + libsuffix)
+
         if platform.startswith('macosx'):
             libsuffix = '.dylib'
         else: