diff --git a/examples/sundials-spherical-mercator.html b/examples/sundials-spherical-mercator.html
index d94b59fdb2..38f7b9321f 100644
--- a/examples/sundials-spherical-mercator.html
+++ b/examples/sundials-spherical-mercator.html
@@ -10,6 +10,9 @@
     <link rel="stylesheet" href="style.css" type="text/css">
 
     <style type="text/css">
+        html, body {
+            height: 100%;
+        }
         #map {
             width: 100%;
             height: 80%;
diff --git a/examples/sundials.html b/examples/sundials.html
index ec965ffc91..b718755171 100644
--- a/examples/sundials.html
+++ b/examples/sundials.html
@@ -8,6 +8,9 @@
     <link rel="stylesheet" href="style.css" type="text/css">
 
     <style type="text/css">
+        html, body {
+            height: 100%;
+        }
         #map {
             width: 100%;
             height: 80%;