diff --git a/build/less/core.less b/build/less/core.less
index 1f6bdc996..52b1a8ac3 100644
--- a/build/less/core.less
+++ b/build/less/core.less
@@ -70,7 +70,7 @@ body {
 }
 
 .content-wrapper  {
-  min-height: 100%;
+  min-height: calc(100% - 102px);
   background-color: @content-bg;
   z-index: 800;
 }