diff --git a/snippy b/snippy
index ffbadb5..c1e8e3e 100755
--- a/snippy
+++ b/snippy
@@ -59,8 +59,8 @@ readonly placeholder_cursor="{cursor}"
 readonly placeholder_clipboard="{clipboard}"
 readonly placeholder_clipboard_urlencode="{clipboard_urlencode}"
 
-readonly tmpfile
-tmpfile=$(mktemp)
+# shellcheck disable=2155
+readonly tmpfile=$(mktemp)
 trap 'rm -f $tmpfile' EXIT HUP INT TRAP TERM
 
 # colors