diff --git a/resources/AppRun.sh b/resources/AppRun.sh
index fe4424a..4bc2d84 100644
--- a/resources/AppRun.sh
+++ b/resources/AppRun.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-this_dir="$(readlink -f "$(dirname "$0")")"
+this_dir="$(dirname -- "$(readlink -f -- "$0")")"
 
 # make appimagetool prefer the bundled mksquashfs
 export PATH="$this_dir"/usr/bin:"$PATH"