diff --git a/guacamole/src/main/webapp/app/osk/styles/osk.css b/guacamole/src/main/webapp/app/osk/styles/osk.css
index c36d40629..fba5c3f97 100644
--- a/guacamole/src/main/webapp/app/osk/styles/osk.css
+++ b/guacamole/src/main/webapp/app/osk/styles/osk.css
@@ -20,6 +20,10 @@
  * THE SOFTWARE.
  */
 
+.osk {
+    position: relative;
+}
+
 .osk .resize-sensor {
     height: 100%;
     width: 100%;