diff --git a/create_orig b/create_orig
index d019f97..83b3fd7 100755
--- a/create_orig
+++ b/create_orig
@@ -1,5 +1,10 @@
 #!/bin/bash
 dirname=${PWD##*/}
+if ! [[ "$dirname" =~ ^lazpaint-[0-9]+(\.[0-9]+)*$ ]]; then
+    echo "Parent folder name must be \"lazpaint-#[.#][.#]\" but is \"$dirname\" instead"
+    echo "where #[.#][.#] is the app version number"
+    exit 1
+fi
 archive=${dirname/-/_}.orig.tar.gz
 read -p "Create \"../${archive}\" file (y/n)?" -n 1 -r
 echo