diff --git a/package/cxfreeze/cx_setup.py b/package/cxfreeze/cx_setup.py
index f929f2b85..e72a5f30d 100644
--- a/package/cxfreeze/cx_setup.py
+++ b/package/cxfreeze/cx_setup.py
@@ -543,7 +543,7 @@ def dummy_hook(*var, **kw):
 
 
 #  generation of the NSIS executable
-nsis = os.path.join("\Program Files (x86)", "NSIS", "makensis.exe")
+nsis = os.path.join(r"\Program Files (x86)", "NSIS", "makensis.exe")
 if sys.platform.startswith("win") and os.path.exists(nsis):
     # check if we can perform the packaging
     outFile = "nsisscript.nsi"