diff --git a/builders/windows-builder.py b/builders/windows-builder.py
index 9c6febc..1fa6cd0 100644
--- a/builders/windows-builder.py
+++ b/builders/windows-builder.py
@@ -226,7 +226,7 @@ class WindowsBuilder(Builder):
         self._run_command([self.portableinstaller_exe, self.portable_dest_path],
                           'Error running PortableApps Installer')
         portable_exe_name = 'OpenLPPortable_%s.paf.exe' % self.portable_version
-        portable_exe_path = os.path.join(self.portable_dest_path, '..', portable_exe_name)
+        portable_exe_path = os.path.abspath(os.path.join(self.portable_dest_path, '..', portable_exe_name))
         self._print_verbose('... Portable Build: {}'.format(portable_exe_path))
         if os.path.exists(portable_exe_path):
             move(portable_exe_path, os.path.join(self.dist_path, '..', portable_exe_name))