diff --git a/winbuild/build_dep.py b/winbuild/build_dep.py
index b137b3224..33443b4f8 100644
--- a/winbuild/build_dep.py
+++ b/winbuild/build_dep.py
@@ -115,7 +115,7 @@ endlocal
 
 rem build openjpeg
 setlocal
-cd /D %%OPENJPEG&&
+cd /D %%OPENJPEG%%
 %%CMAKE%% -DBUILD_THIRDPARTY:BOOL=ON .
 nmake -f Makefile.vc clean
 nmake -f Makefile.vc