diff --git a/theme/base/style/core.css b/theme/base/style/core.css
index ff64a175b0c..819f38c0955 100644
--- a/theme/base/style/core.css
+++ b/theme/base/style/core.css
@@ -1005,7 +1005,7 @@ sup {vertical-align: super;}
 }
 
 .moodle-dialogue-exception .param-stacktrace .stacktrace-file {
-    display:inline-block
+    display:inline-block;
     margin:4px 0;
 }
 .moodle-dialogue-exception .param-stacktrace .stacktrace-line {