diff --git a/doc/html/boostbook.css b/doc/html/boostbook.css
index 252fa9ecfd..0590e8679c 100644
--- a/doc/html/boostbook.css
+++ b/doc/html/boostbook.css
@@ -304,6 +304,11 @@
     Variable Lists
 =============================================================================*/
 
+    div.variablelist
+    {
+        margin: 1em 0;
+    }
+
     /* Make the terms in definition lists bold */
     div.variablelist dl dt,
     span.term
diff --git a/doc/src/boostbook.css b/doc/src/boostbook.css
index 252fa9ecfd..0590e8679c 100644
--- a/doc/src/boostbook.css
+++ b/doc/src/boostbook.css
@@ -304,6 +304,11 @@
     Variable Lists
 =============================================================================*/
 
+    div.variablelist
+    {
+        margin: 1em 0;
+    }
+
     /* Make the terms in definition lists bold */
     div.variablelist dl dt,
     span.term