diff --git a/phpBB/styles/prosilver/theme/common.css b/phpBB/styles/prosilver/theme/common.css
index 6d9bc4fbc4..693319547f 100644
--- a/phpBB/styles/prosilver/theme/common.css
+++ b/phpBB/styles/prosilver/theme/common.css
@@ -450,6 +450,7 @@ a.header-avatar span:after {
 	width: 0;
 	height: 0;
 	-webkit-transform: rotate(360deg); /* better anti-aliasing in webkit */
+	transform: rotate(360deg);
 }
 
 .dropdown-up .pointer,
diff --git a/phpBB/styles/prosilver/theme/forms.css b/phpBB/styles/prosilver/theme/forms.css
index aab5fc92ce..1257c2c56d 100644
--- a/phpBB/styles/prosilver/theme/forms.css
+++ b/phpBB/styles/prosilver/theme/forms.css
@@ -326,6 +326,7 @@ input[type="number"] {
 
 input[type="search"] {
 	-webkit-box-sizing: content-box;
+	box-sizing: content-box;
 	-webkit-appearance: textfield;
 }