diff --git a/phpBB/adm/style/admin.css b/phpBB/adm/style/admin.css
index fee2efb001..e6146e2156 100644
--- a/phpBB/adm/style/admin.css
+++ b/phpBB/adm/style/admin.css
@@ -1605,6 +1605,7 @@ input.button1:focus, input.button2:focus, input.button3:focus {
 	position: fixed;
 	left: 50%;
 	top: 50%;
+	z-index: 51;
 }
 
 /* Pagination
diff --git a/phpBB/styles/prosilver/theme/common.css b/phpBB/styles/prosilver/theme/common.css
index 1e5c9e4e6a..225673a932 100644
--- a/phpBB/styles/prosilver/theme/common.css
+++ b/phpBB/styles/prosilver/theme/common.css
@@ -833,6 +833,7 @@ li.pagination ul {
 	position: fixed;
 	left: 50%;
 	top: 50%;
+	z-index: 51;
 }
 
 /* Miscellaneous styles