diff --git a/quickget b/quickget
index 73e4a62..8caab46 100755
--- a/quickget
+++ b/quickget
@@ -1700,7 +1700,7 @@ function get_deepin() {
     # deepin-desktop-community-20.3-amd64.iso
     local URL="https://cdimage.deepin.com/releases/"${RELEASE}
     # Correct URL for 23-RC onwards which has architecture directories
-    if [[ ! "${RELEASE}" == "20.9" ]] ; then
+    if [ "${RELEASE}" != "20.9" ]; then
         URL+="/amd64"
     fi
     local ISO="deepin-desktop-community-${REV}-amd64.iso"