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diff --git a/res/icon/icon_256x256.png b/res/icon/icon_256x256.png
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diff --git a/res/icon/icon_32x32.png b/res/icon/icon_32x32.png
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diff --git a/res/icon/icon_512x512.png b/res/icon/icon_512x512.png
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diff --git a/res/icon/icon_64x64.png b/res/icon/icon_64x64.png
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diff --git a/res/make-icon.sh b/res/make-icon.sh
index b4e27e7c7..97949b4ae 100755
--- a/res/make-icon.sh
+++ b/res/make-icon.sh
@@ -1,10 +1,13 @@
 #!/bin/bash
 sizes=(16 32 64 128 256 512)
-for i in $sizes; do
+if [ ! -e icon ]; then
+  mkdir icon
+fi
+for i in "${sizes[@]}"; do
   echo "making $i..."
   convert logo.png -filter Mitchell -scale "$i"x"$i" icon/icon_"$i"x"$i".png
 done
-for i in $sizes; do
+for i in "${sizes[@]}"; do
   echo "making $i@2x..."
   convert logo.png -filter Mitchell -scale "$((i*2))"x"$((i*2))" icon/icon_"$i"x"$i""@2x.png"
 done