diff --git a/src/styles/components/poptip.less b/src/styles/components/poptip.less
index 00e871c..7ec8576 100644
--- a/src/styles/components/poptip.less
+++ b/src/styles/components/poptip.less
@@ -69,6 +69,7 @@
             bottom: 1px;
             margin-left: -@poptip-arrow-width;
             border-bottom-width: 0;
+            border-top-width: @poptip-arrow-width;
             border-top-color: #fff;
         }
 
@@ -77,6 +78,7 @@
             left: 1px;
             bottom: -@poptip-arrow-width;
             border-left-width: 0;
+            border-right-width: @poptip-arrow-width;
             border-right-color: #fff;
         }
 
@@ -85,6 +87,7 @@
             top: 1px;
             margin-left: -@poptip-arrow-width;
             border-top-width: 0;
+            border-bottom-width: @poptip-arrow-width;
             border-bottom-color: #fff;
         }
 
@@ -92,6 +95,7 @@
             content: " ";
             right: 1px;
             border-right-width: 0;
+            border-left-width: @poptip-arrow-width;
             border-left-color: #fff;
             bottom: -@poptip-arrow-width;
         }
--
libgit2 0.21.4