diff --git a/windeploy_helper.sh b/windeploy_helper.sh
index 45a797c5..f617623f 100644
--- a/windeploy_helper.sh
+++ b/windeploy_helper.sh
@@ -17,13 +17,13 @@ fi
 
 if [[ "$BUILD_TYPE" == "Release" ]]; then
 	echo "Release build"
-	ICU_FILES="libicuuc57.dll libicuin57.dll libicudt57.dll"
+	ICU_FILES=(libicuuc57.dll libicuin57.dll libicudt57.dll)
 else
 	echo "Debug build"
-	ICU_FILES="libicuucd57.dll libicuind57.dll libicudtd57.dll"
+	ICU_FILES=(libicuucd57.dll libicuind57.dll libicudtd57.dll)
 fi
 
-FILES="zlib1.dll libwinpthread-1.dll libtiff-5.dll libstdc++-6.dll libpng16-16.dll libpcre16-0.dll libpcre-1.dll libmng-2.dll liblzma-5.dll liblcms2-2.dll libjpeg-8.dll libjasper-1.dll libintl-8.dll  libiconv-2.dll libharfbuzz-0.dll libgraphite2.dll libglib-2.0-0.dll libfreetype-6.dll libbz2-1.dll"
+FILES=(zlib1.dll libwinpthread-1.dll libtiff-5.dll libstdc++-6.dll libpng16-16.dll libpcre16-0.dll libpcre-1.dll libmng-2.dll liblzma-5.dll liblcms2-2.dll libjpeg-8.dll libjasper-1.dll libintl-8.dll  libiconv-2.dll libharfbuzz-0.dll libgraphite2.dll libglib-2.0-0.dll libfreetype-6.dll libbz2-1.dll)
 
 platform=$(get_platform)
 
@@ -33,10 +33,9 @@ elif [[ "$platform" == "mingw32" ]]; then
 	PLATFORM_FILES="libgcc_s_dw2-1.dll" 
 fi
 
-for f in $FILES; do cp $MSYSTEM_PREFIX/bin/$f $TARGET; done
+for f in "${FILES[@]}"; do cp $MSYSTEM_PREFIX/bin/$f $TARGET || exit 1; done
 
-for f in $ICU_FILES; do cp $MSYSTEM_PREFIX/bin/$f $TARGET; done
-
-for f in $PLATFORM_FILES; do cp $MSYSTEM_PREFIX/bin/$f $TARGET; done
+for f in "${ICU_FILES[@]}"; do cp $MSYSTEM_PREFIX/bin/$f $TARGET || exit 1; done
 
+for f in "${PLATFORM_FILES[@]}"; do cp $MSYSTEM_PREFIX/bin/$f $TARGET || exit 1; done