diff --git a/theme/formal_white/style/tabs.css b/theme/formal_white/style/tabs.css
index 216045cd130..c4f8db7f586 100644
--- a/theme/formal_white/style/tabs.css
+++ b/theme/formal_white/style/tabs.css
@@ -106,7 +106,7 @@
 
 .tabtree .tabrow1 li a:hover {
     font-weight:bold;
-	text-decoration: underline;
+    text-decoration: underline;
 }
 
 .tabtree .tabrow1 li {
@@ -114,7 +114,7 @@
 }
 
 .tabtree .tabrow1 li.here {
-	font-weight: bold;
+    font-weight: bold;
 }
 
 .groupmanagementtable {