diff --git a/script/install_HDF5.sh b/script/install_HDF5.sh
index 49271d92ca24471f8bf7dae424b1b14fb01ccc2b..4874e0310039fea7763805f63f0cb9f9ef5e384c 100755
--- a/script/install_HDF5.sh
+++ b/script/install_HDF5.sh
@@ -7,7 +7,7 @@ if [ -d "$1/HDF5" ]; then
   exit 0
 fi
 
-if [ ! -d "$1/ZLIB" ]; then
+if [ ! -d "$1/ZLIB"  -a x"$platform" != x"cygwin" ]; then
   rm zlib1211.tar.gz
   rm -rf zlib-1.2.11
   wget https://zlib.net/zlib-1.2.11.tar.gz