diff --git a/console/slides/presets/layout_C1b.html b/console/slides/presets/layout_C1b.html
index 847fa37..5d48543 100644
--- a/console/slides/presets/layout_C1b.html
+++ b/console/slides/presets/layout_C1b.html
@@ -1,3 +1,3 @@
 <div style="position: absolute; width: calc(100% - 120px); height: calc(100% - 120px); left: 60px; top: 60px;">
-  <h1 style="margin 0 auto; text-align: center;">Text</h1>
+  <h1 style="margin: 0 auto; text-align: center;">Text</h1>
 </div>
\ No newline at end of file