diff --git a/css/theme.black-ice.css b/css/theme.black-ice.css
index 40591f37..df98e8b4 100644
--- a/css/theme.black-ice.css
+++ b/css/theme.black-ice.css
@@ -46,6 +46,7 @@
 }
 .tablesorter-blackice thead .sorter-false {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tfoot */
diff --git a/css/theme.blue.css b/css/theme.blue.css
index c7e940f2..ccd25fe8 100644
--- a/css/theme.blue.css
+++ b/css/theme.blue.css
@@ -71,6 +71,7 @@
 }
 .tablesorter-blue thead .sorter-false {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tfoot */
diff --git a/css/theme.dark.css b/css/theme.dark.css
index 1cea02a5..bfc1b168 100644
--- a/css/theme.dark.css
+++ b/css/theme.dark.css
@@ -45,6 +45,7 @@
 }
 .tablesorter-dark thead .sorter-false {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tfoot */
diff --git a/css/theme.default.css b/css/theme.default.css
index 8e227ec4..4330d566 100644
--- a/css/theme.default.css
+++ b/css/theme.default.css
@@ -48,6 +48,7 @@ Default Theme
 }
 .tablesorter-default thead .sorter-false {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tfoot */
diff --git a/css/theme.dropbox.css b/css/theme.dropbox.css
index fb045193..975a542d 100644
--- a/css/theme.dropbox.css
+++ b/css/theme.dropbox.css
@@ -77,6 +77,7 @@
 .tablesorter-dropbox thead .sorter-false i,
 .tablesorter-dropbox thead .sorter-false:hover i {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tbody */
diff --git a/css/theme.green.css b/css/theme.green.css
index d2492d77..422eb3c2 100644
--- a/css/theme.green.css
+++ b/css/theme.green.css
@@ -58,6 +58,7 @@
 }
 .tablesorter-green thead .tablesorter-header.sorter-false {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tfoot */
diff --git a/css/theme.grey.css b/css/theme.grey.css
index 04ea0065..679a0300 100644
--- a/css/theme.grey.css
+++ b/css/theme.grey.css
@@ -80,6 +80,7 @@
 }
 .tablesorter-grey thead .sorter-false i {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tfoot */
diff --git a/css/theme.ice.css b/css/theme.ice.css
index 7118d58f..ba4edc7d 100644
--- a/css/theme.ice.css
+++ b/css/theme.ice.css
@@ -60,6 +60,7 @@
 }
 .tablesorter-ice thead .sorter-false {
 	background-image: url();
+	padding: 4px;
 }
 
 /* tfoot */
diff --git a/css/theme.less b/css/theme.less
index 1353961a..075d6347 100644
--- a/css/theme.less
+++ b/css/theme.less
@@ -176,6 +176,7 @@
 
 	.tablesorter-header.sorter-false {
 		background-image: url();
+		padding: @overallPadding;
 	}
 
 	.tablesorter-headerSortUp {