diff --git a/css/bootstrap.less b/css/bootstrap.less
index 159c7461..1d830813 100644
--- a/css/bootstrap.less
+++ b/css/bootstrap.less
@@ -157,7 +157,7 @@ Test out these custom less files live
 	}
 
 	/* bootstrap uses <i> for icons */
-	.tablesorter-header-inner i {
+	.tablesorter-header-inner i.tablesorter-icon {
 		.iconPosition
 	}
 
diff --git a/css/theme.bootstrap_2.css b/css/theme.bootstrap_2.css
index 62b41e5a..d572c2db 100644
--- a/css/theme.bootstrap_2.css
+++ b/css/theme.bootstrap_2.css
@@ -37,7 +37,7 @@
 }
 
 /* bootstrap uses <i> for icons */
-.tablesorter-bootstrap .tablesorter-header i {
+.tablesorter-bootstrap .tablesorter-header i.tablesorter-icon {
 	position: absolute;
 	right: 2px;
 	top: 50%;