diff --git a/www/code/app-code.less b/www/code/app-code.less
index 5025d4b3c..592078086 100644
--- a/www/code/app-code.less
+++ b/www/code/app-code.less
@@ -98,7 +98,7 @@
     }
 
     @media (max-width: @browser_media-medium-screen) {
-        .CodeMirror {
+        #cp-app-code-container {
             flex: 1;
             max-width: 100%;
             resize: none;
@@ -106,6 +106,6 @@
         #cp-app-code-preview {
             display: none !important;
         }
-}
+    }
 }