diff --git a/less/dropdowns.less b/less/dropdowns.less
index 938e682f50..1cd76a0705 100644
--- a/less/dropdowns.less
+++ b/less/dropdowns.less
@@ -17,6 +17,12 @@
   content: "";
 }
 
+// The dropdown wrapper (div)
+// --------------------------
+.dropdown {
+  position: relative;
+}
+
 // The dropdown menu (ul)
 // ----------------------
 .dropdown-menu {