diff --git a/src/main/java/net/md_5/specialsource/mavenplugin/RemapMojo.java b/src/main/java/net/md_5/specialsource/mavenplugin/RemapMojo.java
index 210aa15..b15b04b 100644
--- a/src/main/java/net/md_5/specialsource/mavenplugin/RemapMojo.java
+++ b/src/main/java/net/md_5/specialsource/mavenplugin/RemapMojo.java
@@ -253,7 +253,7 @@ private void replaceFile( File oldFile, File newFile )
     {
         getLog().info( "Replacing " + oldFile + " with " + newFile );
 
-        File origFile = new File( outputDirectory, "original-" + oldFile.getName() );
+        File origFile = new File( project.getBuild().getDirectory(), "original-" + oldFile.getName() );
         if ( oldFile.exists() && !oldFile.renameTo( origFile ) )
         {
             //try a gc to see if an unclosed stream needs garbage collecting