diff --git a/lib/editor/tinymce/lib.php b/lib/editor/tinymce/lib.php
index a7404834068..1d0529df36f 100644
--- a/lib/editor/tinymce/lib.php
+++ b/lib/editor/tinymce/lib.php
@@ -152,6 +152,7 @@ class tinymce_texteditor extends texteditor {
                     'theme_advanced_fonts' => $fontselectlist,
                     'theme_advanced_resize_horizontal' => true,
                     'theme_advanced_resizing' => true,
+                    'theme_advanced_resizing_min_height' => 30,
                     'min_height' => 30,
                     'theme_advanced_toolbar_location' => "top",
                     'theme_advanced_statusbar_location' => "bottom",