diff --git a/scripts/packaging/windows_distro.py b/scripts/packaging/windows_distro.py
index f0000e50622..8179153c9c7 100644
--- a/scripts/packaging/windows_distro.py
+++ b/scripts/packaging/windows_distro.py
@@ -206,7 +206,7 @@ def create_webots_bundle(self, include_commit_file):
             INNO_SETUP_HOME = "/C/Program Files (x86)/Inno Setup 6"
         print('creating webots_setup.exe (takes long)\n')
         subprocess.run(
-            [INNO_SETUP_HOME + "/iscc", "-Q", "webots.iss"]
+            [INNO_SETUP_HOME + '/iscc', '-Q', 'webots.iss']
         ).check_returncode()
 
         print('Done.')