diff --git a/news_from_ismas b/news_from_ismas
index 53716d7..de4f592 100755
--- a/news_from_ismas
+++ b/news_from_ismas
@@ -2,7 +2,8 @@
 
 source ./log_helpers
 
-if [ ${news_to_ismas_sourced:-1} = "1" ]; then    # include only once
+if [ "${news_from_ismas_sourced:-1}" = "1" ]; then    # include only once
+    readonly news_from_ismas_sourced=${BASH_SOURCE[0]}
     readonly APISM_DIRECT_PORT=7778
 
     updates_available () {