diff --git a/services/web/frontend/js/vendor/libs/bib-log-parser.js b/services/web/frontend/js/vendor/libs/bib-log-parser.js
index f726eb6c52..dad0bd8b0c 100644
--- a/services/web/frontend/js/vendor/libs/bib-log-parser.js
+++ b/services/web/frontend/js/vendor/libs/bib-log-parser.js
@@ -36,7 +36,7 @@ define(function() {
   SINGLELINE_WARNING_REGEX = /^Warning--(.+)$/m;
   MULTILINE_ERROR_REGEX = /^(.*)---line (\d+) of file (.*)\n([^]+?)\nI'm skipping whatever remains of this entry$/m;
   BAD_CROSS_REFERENCE_REGEX = /^(A bad cross reference---entry ".+?"\nrefers to entry.+?, which doesn't exist)$/m;
-  MULTILINE_COMMAND_ERROR_REGEX = /^(.*)\n---line (\d+) of file (.*)\n([^]+?)\nI'm skipping whatever remains of this command$/m;
+  MULTILINE_COMMAND_ERROR_REGEX = /^(.*)\n?---line (\d+) of file (.*)\n([^]+?)\nI'm skipping whatever remains of this command$/m;
   warningParsers = [
     [
       MULTILINE_WARNING_REGEX, function(match) {